397992437 has 8 divisors (see below), whose sum is σ = 415496256. Its totient is φ = 380505312.

The previous prime is 397992431. The next prime is 397992443. The reversal of 397992437 is 734299793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (397992431) and next prime (397992443).

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

It is a cyclic number.

It is not a de Polignac number, because 397992437 - 2²⁶ = 330883573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397992431) 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, 90473 + ... + 94769.

It is an arithmetic number, because the mean of its divisors is an integer number (51937032).

Almost surely, 2^397992437 is an apocalyptic number.

It is an amenable number.

397992437 is a deficient number, since it is larger than the sum of its proper divisors (17503819).

397992437 is a wasteful number, since it uses less digits than its factorization.

397992437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8347.

The product of its digits is 2571912, while the sum is 53.

The square root of 397992437 is about 19949.7477928920. The cubic root of 397992437 is about 735.5715775450.

The spelling of 397992437 in words is "three hundred ninety-seven million, nine hundred ninety-two thousand, four hundred thirty-seven".