39479531549 has 2 divisors, whose sum is σ = 39479531550. Its totient is φ = 39479531548.

The previous prime is 39479531537. The next prime is 39479531593. The reversal of 39479531549 is 94513597493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24987705625 + 14491825924 = 158075^2 + 120382^2 .

It is a cyclic number.

It is not a de Polignac number, because 39479531549 - 2²⁴ = 39462754333 is a prime.

It is a super-2 number, since 2×39479531549² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39479531599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19739765774 + 19739765775.

It is an arithmetic number, because the mean of its divisors is an integer number (19739765775).

Almost surely, 2^39479531549 is an apocalyptic number.

It is an amenable number.

39479531549 is a deficient number, since it is larger than the sum of its proper divisors (1).

39479531549 is an equidigital number, since it uses as much as digits as its factorization.

39479531549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18370800, while the sum is 59.

The spelling of 39479531549 in words is "thirty-nine billion, four hundred seventy-nine million, five hundred thirty-one thousand, five hundred forty-nine".