981268731 has 24 divisors (see below), whose sum is σ = 1431555840. Its totient is φ = 647665200.

The previous prime is 981268727. The next prime is 981268733. The reversal of 981268731 is 137862189.

It is not a de Polignac number, because 981268731 - 2² = 981268727 is a prime.

It is a super-2 number, since 2×981268731² = 1925776644876700722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (981268733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 743290 + ... + 744608.

It is an arithmetic number, because the mean of its divisors is an integer number (59648160).

Almost surely, 2^981268731 is an apocalyptic number.

981268731 is a deficient number, since it is larger than the sum of its proper divisors (450287109).

981268731 is a wasteful number, since it uses less digits than its factorization.

981268731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087 (or 2084 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 981268731 is about 31325.2091932360. The cubic root of 981268731 is about 993.7168483541.

The spelling of 981268731 in words is "nine hundred eighty-one million, two hundred sixty-eight thousand, seven hundred thirty-one".