397089718 has 4 divisors (see below), whose sum is σ = 595634580. Its totient is φ = 198544858.

The previous prime is 397089713. The next prime is 397089739. The reversal of 397089718 is 817980793.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397089713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99272428 + ... + 99272431.

It is an arithmetic number, because the mean of its divisors is an integer number (148908645).

Almost surely, 2^397089718 is an apocalyptic number.

397089718 is a deficient number, since it is larger than the sum of its proper divisors (198544862).

397089718 is a wasteful number, since it uses less digits than its factorization.

397089718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198544861.

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 397089718 is about 19927.1101266591. The cubic root of 397089718 is about 735.0150199778.

The spelling of 397089718 in words is "three hundred ninety-seven million, eighty-nine thousand, seven hundred eighteen".