997609037 has 8 divisors (see below), whose sum is σ = 1002221304. Its totient is φ = 993005568.

The previous prime is 997609033. The next prime is 997609057. The reversal of 997609037 is 730906799.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 700184521 + 297424516 = 26461^2 + 17246^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 997609037 - 2² = 997609033 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997609033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336353 + ... + 339305.

It is an arithmetic number, because the mean of its divisors is an integer number (125277663).

Almost surely, 2^997609037 is an apocalyptic number.

It is an amenable number.

997609037 is a deficient number, since it is larger than the sum of its proper divisors (4612267).

997609037 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (997609036) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (4399).

997609037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 997609037 is about 31584.9495329659. The cubic root of 997609037 is about 999.2023762989.

The spelling of 997609037 in words is "nine hundred ninety-seven million, six hundred nine thousand, thirty-seven".