393630631 has 4 divisors (see below), whose sum is σ = 416785392. Its totient is φ = 370475872.

The previous prime is 393630617. The next prime is 393630649. The reversal of 393630631 is 136036393.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 393630631 - 2²¹ = 391533479 is a prime.

It is a super-2 number, since 2×393630631² = 309890147322916322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393630691) 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, 11577355 + ... + 11577388.

It is an arithmetic number, because the mean of its divisors is an integer number (104196348).

Almost surely, 2^393630631 is an apocalyptic number.

393630631 is a deficient number, since it is larger than the sum of its proper divisors (23154761).

393630631 is a wasteful number, since it uses less digits than its factorization.

393630631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23154760.

The product of its (nonzero) digits is 26244, while the sum is 34.

The square root of 393630631 is about 19840.1267889094. The cubic root of 393630631 is about 732.8745302087.

The spelling of 393630631 in words is "three hundred ninety-three million, six hundred thirty thousand, six hundred thirty-one".