3944698631 has 4 divisors (see below), whose sum is σ = 3945396264. Its totient is φ = 3944001000.

The previous prime is 3944698627. The next prime is 3944698657. The reversal of 3944698631 is 1368964493.

3944698631 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1368964493 = 13 ⋅105304961.

It is a cyclic number.

It is not a de Polignac number, because 3944698631 - 2² = 3944698627 is a prime.

It is a super-2 number, since 2×3944698631² = 31121294578826548322, 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 (3944698531) 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, 340265 + ... + 351666.

It is an arithmetic number, because the mean of its divisors is an integer number (986349066).

Almost surely, 2^3944698631 is an apocalyptic number.

3944698631 is a deficient number, since it is larger than the sum of its proper divisors (697633).

3944698631 is an equidigital number, since it uses as much as digits as its factorization.

3944698631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697632.

The product of its digits is 3359232, while the sum is 53.

The square root of 3944698631 is about 62806.8358620302. The cubic root of 3944698631 is about 1580.0516234535.

The spelling of 3944698631 in words is "three billion, nine hundred forty-four million, six hundred ninety-eight thousand, six hundred thirty-one".