39306631 has 32 divisors (see below), whose sum is σ = 50357888. Its totient is φ = 29859840.

The previous prime is 39306613. The next prime is 39306637. The reversal of 39306631 is 13660393.

It is a 13-Lehmer number, since φ(39306631) divides (39306631-1)¹³.

It is a cyclic number.

It is not a de Polignac number, because 39306631 - 2¹⁷ = 39175559 is a prime.

It is a super-2 number, since 2×39306631² = 3090022481140322, which contains 22 as substring.

It is the 6270-th Hogben number.

It is a junction number, because it is equal to n+sod(n) for n = 39306593 and 39306602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39306637) by changing a digit.

It is a nontrivial repunit in base 6269.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405175 + ... + 405271.

It is an arithmetic number, because the mean of its divisors is an integer number (1573684).

Almost surely, 2^39306631 is an apocalyptic number.

39306631 is a deficient number, since it is larger than the sum of its proper divisors (11051257).

39306631 is a wasteful number, since it uses less digits than its factorization.

39306631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 39306631 is about 6269.5000598134. The cubic root of 39306631 is about 340.0075863359.

The spelling of 39306631 in words is "thirty-nine million, three hundred six thousand, six hundred thirty-one".