39479731 has 2 divisors, whose sum is σ = 39479732. Its totient is φ = 39479730.

The previous prime is 39479723. The next prime is 39479743. The reversal of 39479731 is 13797493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39479731 - 2³ = 39479723 is a prime.

It is a super-2 number, since 2×39479731² = 3117298319664722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39470731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19739865 + 19739866.

It is an arithmetic number, because the mean of its divisors is an integer number (19739866).

Almost surely, 2^39479731 is an apocalyptic number.

39479731 is a deficient number, since it is larger than the sum of its proper divisors (1).

39479731 is an equidigital number, since it uses as much as digits as its factorization.

39479731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 43.

The square root of 39479731 is about 6283.2898230147. The cubic root of 39479731 is about 340.5059681276.

The spelling of 39479731 in words is "thirty-nine million, four hundred seventy-nine thousand, seven hundred thirty-one".