997613538 has 8 divisors (see below), whose sum is σ = 1995227088. Its totient is φ = 332537844.

The previous prime is 997613521. The next prime is 997613579. The reversal of 997613538 is 835316799.

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

997613538 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83134456 + ... + 83134467.

It is an arithmetic number, because the mean of its divisors is an integer number (249403386).

Almost surely, 2^997613538 is an apocalyptic number.

997613538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

997613538 is a wasteful number, since it uses less digits than its factorization.

997613538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166268928.

The product of its digits is 1224720, while the sum is 51.

The square root of 997613538 is about 31585.0207851760. The cubic root of 997613538 is about 999.2038790263.

The spelling of 997613538 in words is "nine hundred ninety-seven million, six hundred thirteen thousand, five hundred thirty-eight".