487724981 has 2 divisors, whose sum is σ = 487724982. Its totient is φ = 487724980.

The previous prime is 487724977. The next prime is 487724983. The reversal of 487724981 is 189427784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 483604081 + 4120900 = 21991^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 487724981 - 2² = 487724977 is a prime.

It is a super-2 number, since 2×487724981² = 475751314182900722, which contains 22 as substring.

Together with 487724983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (487724983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243862490 + 243862491.

It is an arithmetic number, because the mean of its divisors is an integer number (243862491).

Almost surely, 2^487724981 is an apocalyptic number.

It is an amenable number.

487724981 is a deficient number, since it is larger than the sum of its proper divisors (1).

487724981 is an equidigital number, since it uses as much as digits as its factorization.

487724981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 50.

The square root of 487724981 is about 22084.4963945298. The cubic root of 487724981 is about 787.1515110800.

The spelling of 487724981 in words is "four hundred eighty-seven million, seven hundred twenty-four thousand, nine hundred eighty-one".