397865611 has 32 divisors (see below), whose sum is σ = 479001600. Its totient is φ = 325718400.

The previous prime is 397865593. The next prime is 397865621. The reversal of 397865611 is 116568793.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 397865611 - 2¹³ = 397857419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397865621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1512666 + ... + 1512928.

It is an arithmetic number, because the mean of its divisors is an integer number (14968800).

Almost surely, 2^397865611 is an apocalyptic number.

397865611 is a deficient number, since it is larger than the sum of its proper divisors (81135989).

397865611 is a wasteful number, since it uses less digits than its factorization.

397865611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507.

The product of its digits is 272160, while the sum is 46.

The square root of 397865611 is about 19946.5689029467. The cubic root of 397865611 is about 735.4934357653.

The spelling of 397865611 in words is "three hundred ninety-seven million, eight hundred sixty-five thousand, six hundred eleven".