7938049931 has 24 divisors (see below), whose sum is σ = 9480510864. Its totient is φ = 6624421440.

The previous prime is 7938049927. The next prime is 7938049949. The reversal of 7938049931 is 1399408397.

It is a happy number.

It is not a de Polignac number, because 7938049931 - 2² = 7938049927 is a prime.

It is a super-2 number, since 2×7938049931² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7938049531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328541 + ... + 351873.

It is an arithmetic number, because the mean of its divisors is an integer number (395021286).

Almost surely, 2^7938049931 is an apocalyptic number.

7938049931 is a deficient number, since it is larger than the sum of its proper divisors (1542460933).

7938049931 is a wasteful number, since it uses less digits than its factorization.

7938049931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23531 (or 23524 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 7938049931 is about 89095.7346397682. The cubic root of 7938049931 is about 1994.8241108911.

The spelling of 7938049931 in words is "seven billion, nine hundred thirty-eight million, forty-nine thousand, nine hundred thirty-one".