488656981 has 4 divisors (see below), whose sum is σ = 488708032. Its totient is φ = 488605932.

The previous prime is 488656969. The next prime is 488657017. The reversal of 488656981 is 189656884.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(488656981) divides (488656981-1)³.

It is a cyclic number.

It is not a de Polignac number, because 488656981 - 2⁷ = 488656853 is a prime.

It is a super-2 number, since 2×488656981² = 477571290160068722, which contains 22 as substring.

It is a deceptive number, since it divides R_488656980.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (488656921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6381 + ... + 31906.

It is an arithmetic number, because the mean of its divisors is an integer number (122177008).

It is a Poulet number, since it divides 2^488656980-1.

Almost surely, 2^488656981 is an apocalyptic number.

488656981 is the 12763-rd octagonal number.

It is an amenable number.

488656981 is a deficient number, since it is larger than the sum of its proper divisors (51051).

488656981 is a wasteful number, since it uses less digits than its factorization.

488656981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51050.

The product of its digits is 3317760, while the sum is 55.

The square root of 488656981 is about 22105.5870991928. The cubic root of 488656981 is about 787.6525847276.

The spelling of 488656981 in words is "four hundred eighty-eight million, six hundred fifty-six thousand, nine hundred eighty-one".