397017087 has 4 divisors (see below), whose sum is σ = 529356120. Its totient is φ = 264678056.

The previous prime is 397017083. The next prime is 397017119. The reversal of 397017087 is 780710793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780710793 = 3 ⋅260236931.

It is a cyclic number.

It is not a de Polignac number, because 397017087 - 2² = 397017083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397017083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66169512 + ... + 66169517.

It is an arithmetic number, because the mean of its divisors is an integer number (132339030).

Almost surely, 2^397017087 is an apocalyptic number.

397017087 is a deficient number, since it is larger than the sum of its proper divisors (132339033).

397017087 is a wasteful number, since it uses less digits than its factorization.

397017087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132339032.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 397017087 is about 19925.2876265313. The cubic root of 397017087 is about 734.9702037993.

The spelling of 397017087 in words is "three hundred ninety-seven million, seventeen thousand, eighty-seven".