997956964 has 12 divisors (see below), whose sum is σ = 1747300464. Its totient is φ = 498728264.

The previous prime is 997956937. The next prime is 997956979. The reversal of 997956964 is 469659799.

997956964 = T₂₅₇₉₂ + T₂₅₇₉₃ + T₂₅₇₉₄.

It is a junction number, because it is equal to n+sod(n) for n = 997956896 and 997956905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53434 + ... + 69649.

It is an arithmetic number, because the mean of its divisors is an integer number (145608372).

Almost surely, 2^997956964 is an apocalyptic number.

997956964 is the 25794-th centered triangular number.

It is an amenable number.

997956964 is a deficient number, since it is larger than the sum of its proper divisors (749343500).

997956964 is a wasteful number, since it uses less digits than its factorization.

997956964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125114 (or 125112 counting only the distinct ones).

The product of its digits is 33067440, while the sum is 64.

The square root of 997956964 is about 31590.4568501312. The cubic root of 997956964 is about 999.3185236955.

The spelling of 997956964 in words is "nine hundred ninety-seven million, nine hundred fifty-six thousand, nine hundred sixty-four".