988269981 has 4 divisors (see below), whose sum is σ = 1317693312. Its totient is φ = 658846652.

The previous prime is 988269979. The next prime is 988269991. The reversal of 988269981 is 189962889.

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.

It is a cyclic number.

It is not a de Polignac number, because 988269981 - 2¹ = 988269979 is a prime.

It is a super-2 number, since 2×988269981² = 1953355110691480722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988269901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164711661 + ... + 164711666.

It is an arithmetic number, because the mean of its divisors is an integer number (329423328).

Almost surely, 2^988269981 is an apocalyptic number.

It is an amenable number.

988269981 is a deficient number, since it is larger than the sum of its proper divisors (329423331).

988269981 is a wasteful number, since it uses less digits than its factorization.

988269981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329423330.

The product of its digits is 4478976, while the sum is 60.

The square root of 988269981 is about 31436.7616175712. The cubic root of 988269981 is about 996.0746051033.

The spelling of 988269981 in words is "nine hundred eighty-eight million, two hundred sixty-nine thousand, nine hundred eighty-one".