997091064 has 48 divisors (see below), whose sum is σ = 2702208600. Its totient is φ = 332147904.

The previous prime is 997091047. The next prime is 997091077. The reversal of 997091064 is 460190799.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 138547 + ... + 145565.

Almost surely, 2^997091064 is an apocalyptic number.

It is an amenable number.

997091064 is an abundant number, since it is smaller than the sum of its proper divisors (1705117536).

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

997091064 is a wasteful number, since it uses less digits than its factorization.

997091064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9004 (or 8997 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 997091064 is about 31576.7487876760. The cubic root of 997091064 is about 999.0294129322.

The spelling of 997091064 in words is "nine hundred ninety-seven million, ninety-one thousand, sixty-four".