397191039 has 16 divisors (see below), whose sum is σ = 606582528. Its totient is φ = 226464192.

The previous prime is 397191007. The next prime is 397191049. The reversal of 397191039 is 930191793.

It is not a de Polignac number, because 397191039 - 2⁵ = 397191007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397191049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11097 + ... + 30290.

It is an arithmetic number, because the mean of its divisors is an integer number (37911408).

Almost surely, 2^397191039 is an apocalyptic number.

397191039 is a deficient number, since it is larger than the sum of its proper divisors (209391489).

397191039 is a wasteful number, since it uses less digits than its factorization.

397191039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41854.

The product of its (nonzero) digits is 45927, while the sum is 42.

The square root of 397191039 is about 19929.6522548689. The cubic root of 397191039 is about 735.0775298845.

The spelling of 397191039 in words is "three hundred ninety-seven million, one hundred ninety-one thousand, thirty-nine".