3918971425 has 18 divisors (see below), whose sum is σ = 4886237174. Its totient is φ = 3118036800.

The previous prime is 3918971411. The next prime is 3918971431. The reversal of 3918971425 is 5241798193.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 276124689 + 3642846736 = 16617^2 + 60356^2 .

It is not a de Polignac number, because 3918971425 - 2⁷ = 3918971297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 909877 + ... + 914173.

Almost surely, 2^3918971425 is an apocalyptic number.

It is an amenable number.

3918971425 is a deficient number, since it is larger than the sum of its proper divisors (967265749).

3918971425 is an equidigital number, since it uses as much as digits as its factorization.

3918971425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4689 (or 4493 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The square root of 3918971425 is about 62601.6886753065. The cubic root of 3918971425 is about 1576.6091121747.

The spelling of 3918971425 in words is "three billion, nine hundred eighteen million, nine hundred seventy-one thousand, four hundred twenty-five".