997764012 has 72 divisors (see below), whose sum is σ = 3007769856. Its totient is φ = 272679264.

The previous prime is 997764011. The next prime is 997764037. The reversal of 997764012 is 210467799.

It is a super-2 number, since 2×997764012² = 1991066047284672288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (997764011) 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, 80278 + ... + 91869.

Almost surely, 2^997764012 is an apocalyptic number.

997764012 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

997764012 is an abundant number, since it is smaller than the sum of its proper divisors (2010005844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997764012 is a wasteful number, since it uses less digits than its factorization.

997764012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172187 (or 172182 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 997764012 is about 31587.4027422325. The cubic root of 997764012 is about 999.2541144598.

The spelling of 997764012 in words is "nine hundred ninety-seven million, seven hundred sixty-four thousand, twelve".