39107831049 has 135 divisors (see below), whose sum is σ = 70541681463. Its totient is φ = 21528618048.

The previous prime is 39107831041. The next prime is 39107831051. The reversal of 39107831049 is 94013870193.

The square root of 39107831049 is 197757.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 22199510025 + 16908321024 = 148995^2 + 130032^2 .

It is not a de Polignac number, because 39107831049 - 2³ = 39107831041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39107830995 and 39107831013.

It is not an unprimeable number, because it can be changed into a prime (39107831041) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 535723677 + ... + 535723749.

Almost surely, 2^39107831049 is an apocalyptic number.

39107831049 is the 197757-th square number.

39107831049 is the 98879-th centered octagonal number.

It is an amenable number.

39107831049 is a deficient number, since it is larger than the sum of its proper divisors (31433850414).

39107831049 is an frugal number, since it uses more digits than its factorization.

39107831049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 39107831049 in words is "thirty-nine billion, one hundred seven million, eight hundred thirty-one thousand, forty-nine".