39964031 has 4 divisors (see below), whose sum is σ = 40140312. Its totient is φ = 39787752.

The previous prime is 39964027. The next prime is 39964073. The reversal of 39964031 is 13046993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13046993 = 193 ⋅67601.

It is a cyclic number.

It is not a de Polignac number, because 39964031 - 2² = 39964027 is a prime.

It is a super-2 number, since 2×39964031² = 3194247547537922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39963982 and 39964000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39964021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87800 + ... + 88253.

It is an arithmetic number, because the mean of its divisors is an integer number (10035078).

Almost surely, 2^39964031 is an apocalyptic number.

39964031 is a deficient number, since it is larger than the sum of its proper divisors (176281).

39964031 is a wasteful number, since it uses less digits than its factorization.

39964031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176280.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 39964031 is about 6321.7110816614. The cubic root of 39964031 is about 341.8926483854.

The spelling of 39964031 in words is "thirty-nine million, nine hundred sixty-four thousand, thirty-one".