397163869511 has 4 divisors (see below), whose sum is σ = 397166687712. Its totient is φ = 397161051312.

The previous prime is 397163869499. The next prime is 397163869513. The reversal of 397163869511 is 115968361793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 115968361793 = 185303 ⋅625831.

It is a cyclic number.

It is not a de Polignac number, because 397163869511 - 2²⁶ = 397096760647 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 (397163869513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185926 + ... + 1483491.

It is an arithmetic number, because the mean of its divisors is an integer number (99291671928).

Almost surely, 2^397163869511 is an apocalyptic number.

397163869511 is a deficient number, since it is larger than the sum of its proper divisors (2818201).

397163869511 is a wasteful number, since it uses less digits than its factorization.

397163869511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818200.

The product of its digits is 7348320, while the sum is 59.

The spelling of 397163869511 in words is "three hundred ninety-seven billion, one hundred sixty-three million, eight hundred sixty-nine thousand, five hundred eleven".