396373993 has 4 divisors (see below), whose sum is σ = 396419328. Its totient is φ = 396328660.

The previous prime is 396373987. The next prime is 396373997. The reversal of 396373993 is 399373693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 396373993 - 2⁵ = 396373961 is a prime.

It is a super-2 number, since 2×396373993² = 314224684653528098, which contains 22 as substring.

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 396373993.

It is not an unprimeable number, because it can be changed into a prime (396373997) 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, 4921 + ... + 28582.

It is an arithmetic number, because the mean of its divisors is an integer number (99104832).

Almost surely, 2^396373993 is an apocalyptic number.

It is an amenable number.

396373993 is a deficient number, since it is larger than the sum of its proper divisors (45335).

396373993 is a wasteful number, since it uses less digits than its factorization.

396373993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45334.

The product of its digits is 2480058, while the sum is 52.

The square root of 396373993 is about 19909.1434521930. The cubic root of 396373993 is about 734.5731508948.

The spelling of 396373993 in words is "three hundred ninety-six million, three hundred seventy-three thousand, nine hundred ninety-three".