39950891 has 2 divisors, whose sum is σ = 39950892. Its totient is φ = 39950890.

The previous prime is 39950887. The next prime is 39950899. The reversal of 39950891 is 19805993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39950891 - 2² = 39950887 is a prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (39950899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19975445 + 19975446.

It is an arithmetic number, because the mean of its divisors is an integer number (19975446).

Almost surely, 2^39950891 is an apocalyptic number.

39950891 is a deficient number, since it is larger than the sum of its proper divisors (1).

39950891 is an equidigital number, since it uses as much as digits as its factorization.

39950891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 39950891 is about 6320.6717206322. The cubic root of 39950891 is about 341.8551733380.

The spelling of 39950891 in words is "thirty-nine million, nine hundred fifty thousand, eight hundred ninety-one".