397052437 has 4 divisors (see below), whose sum is σ = 397765836. Its totient is φ = 396339040.

The previous prime is 397052401. The next prime is 397052471. The reversal of 397052437 is 734250793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 734250793 = 443 ⋅1657451.

It can be written as a sum of positive squares in 2 ways, for example, as 182547121 + 214505316 = 13511^2 + 14646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397052437 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397052437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397055437) 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, 355864 + ... + 356977.

It is an arithmetic number, because the mean of its divisors is an integer number (99441459).

Almost surely, 2^397052437 is an apocalyptic number.

It is an amenable number.

397052437 is a deficient number, since it is larger than the sum of its proper divisors (713399).

397052437 is an equidigital number, since it uses as much as digits as its factorization.

397052437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713398.

The product of its (nonzero) digits is 158760, while the sum is 40.

The square root of 397052437 is about 19926.1746705182. The cubic root of 397052437 is about 734.9920168198.

The spelling of 397052437 in words is "three hundred ninety-seven million, fifty-two thousand, four hundred thirty-seven".