39950081 has 4 divisors (see below), whose sum is σ = 41327700. Its totient is φ = 38572464.

The previous prime is 39950077. The next prime is 39950089. The reversal of 39950081 is 18005993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27133681 + 12816400 = 5209^2 + 3580^2 .

It is a cyclic number.

It is not a de Polignac number, because 39950081 - 2² = 39950077 is a prime.

It is a super-2 number, since 2×39950081² = 3192017943813122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39950089) 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, 688766 + ... + 688823.

It is an arithmetic number, because the mean of its divisors is an integer number (10331925).

Almost surely, 2^39950081 is an apocalyptic number.

It is an amenable number.

39950081 is a deficient number, since it is larger than the sum of its proper divisors (1377619).

39950081 is a wasteful number, since it uses less digits than its factorization.

39950081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377618.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 39950081 is about 6320.6076448392. The cubic root of 39950081 is about 341.8528629635.

The spelling of 39950081 in words is "thirty-nine million, nine hundred fifty thousand, eighty-one".