397788537 has 8 divisors (see below), whose sum is σ = 530718400. Its totient is φ = 265025520.

The previous prime is 397788529. The next prime is 397788577. The reversal of 397788537 is 735887793.

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

It is not a de Polignac number, because 397788537 - 2³ = 397788529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397788577) 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, 36037 + ... + 45762.

It is an arithmetic number, because the mean of its divisors is an integer number (66339800).

Almost surely, 2^397788537 is an apocalyptic number.

It is an amenable number.

397788537 is a deficient number, since it is larger than the sum of its proper divisors (132929863).

397788537 is a wasteful number, since it uses less digits than its factorization.

397788537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83423.

The product of its digits is 8890560, while the sum is 57.

The square root of 397788537 is about 19944.6367978963. The cubic root of 397788537 is about 735.4459397597.

The spelling of 397788537 in words is "three hundred ninety-seven million, seven hundred eighty-eight thousand, five hundred thirty-seven".