397017437 has 4 divisors (see below), whose sum is σ = 407747676. Its totient is φ = 386287200.

The previous prime is 397017427. The next prime is 397017451. The reversal of 397017437 is 734710793.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 148986436 + 248031001 = 12206^2 + 15749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397017437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397017394 and 397017403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397017427) 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, 5365064 + ... + 5365137.

It is an arithmetic number, because the mean of its divisors is an integer number (101936919).

Almost surely, 2^397017437 is an apocalyptic number.

397017437 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

397017437 is a deficient number, since it is larger than the sum of its proper divisors (10730239).

397017437 is a wasteful number, since it uses less digits than its factorization.

397017437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10730238.

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 397017437 is about 19925.2964093386. The cubic root of 397017437 is about 734.9704197761.

The spelling of 397017437 in words is "three hundred ninety-seven million, seventeen thousand, four hundred thirty-seven".