7938525431 has 4 divisors (see below), whose sum is σ = 7944944232. Its totient is φ = 7932106632.

The previous prime is 7938525409. The next prime is 7938525449. The reversal of 7938525431 is 1345258397.

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 7938525431 - 2²² = 7934331127 is a prime.

It is a super-2 number, since 2×7938525431² (a number of 21 digits) 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 (7938525031) 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, 3207545 + ... + 3210018.

It is an arithmetic number, because the mean of its divisors is an integer number (1986236058).

Almost surely, 2^7938525431 is an apocalyptic number.

7938525431 is a deficient number, since it is larger than the sum of its proper divisors (6418801).

7938525431 is a wasteful number, since it uses less digits than its factorization.

7938525431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6418800.

The product of its digits is 907200, while the sum is 47.

The square root of 7938525431 is about 89098.4030777208. The cubic root of 7938525431 is about 1994.8639409893.

The spelling of 7938525431 in words is "seven billion, nine hundred thirty-eight million, five hundred twenty-five thousand, four hundred thirty-one".