39880969 has 2 divisors, whose sum is σ = 39880970. Its totient is φ = 39880968.

The previous prime is 39880937. The next prime is 39881027. The reversal of 39880969 is 96908893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 190969 = 6300^2 + 437^2 .

It is a cyclic number.

It is not a de Polignac number, because 39880969 - 2⁵ = 39880937 is a prime.

It is a super-2 number, since 2×39880969² = 3180983376757922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39880469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19940484 + 19940485.

It is an arithmetic number, because the mean of its divisors is an integer number (19940485).

Almost surely, 2^39880969 is an apocalyptic number.

It is an amenable number.

39880969 is a deficient number, since it is larger than the sum of its proper divisors (1).

39880969 is an equidigital number, since it uses as much as digits as its factorization.

39880969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 39880969 is about 6315.1380824175. The cubic root of 39880969 is about 341.6556187055.

The spelling of 39880969 in words is "thirty-nine million, eight hundred eighty thousand, nine hundred sixty-nine".