39961377 has 16 divisors (see below), whose sum is σ = 59476480. Its totient is φ = 26517456.

The previous prime is 39961343. The next prime is 39961379. The reversal of 39961377 is 77316993.

It is not a de Polignac number, because 39961377 - 2⁸ = 39961121 is a prime.

It is a super-2 number, since 2×39961377² = 3193823303472258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39961379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2703 + ... + 9339.

It is an arithmetic number, because the mean of its divisors is an integer number (3717280).

Almost surely, 2^39961377 is an apocalyptic number.

It is an amenable number.

39961377 is a deficient number, since it is larger than the sum of its proper divisors (19515103).

39961377 is a wasteful number, since it uses less digits than its factorization.

39961377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6869 (or 6863 counting only the distinct ones).

The product of its digits is 214326, while the sum is 45.

The square root of 39961377 is about 6321.5011666534. The cubic root of 39961377 is about 341.8850798864.

It can be divided in two parts, 399 and 61377, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 39961377 in words is "thirty-nine million, nine hundred sixty-one thousand, three hundred seventy-seven".