997090518 has 16 divisors (see below), whose sum is σ = 2009405376. Its totient is φ = 329826120.

The previous prime is 997090513. The next prime is 997090547. The reversal of 997090518 is 815090799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997090513) 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, 633496 + ... + 635067.

It is an arithmetic number, because the mean of its divisors is an integer number (125587836).

Almost surely, 2^997090518 is an apocalyptic number.

997090518 is an abundant number, since it is smaller than the sum of its proper divisors (1012314858).

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

997090518 is a wasteful number, since it uses less digits than its factorization.

997090518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268699.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 997090518 is about 31576.7401420729. The cubic root of 997090518 is about 999.0292305783.

The spelling of 997090518 in words is "nine hundred ninety-seven million, ninety thousand, five hundred eighteen".