39799967 has 2 divisors, whose sum is σ = 39799968. Its totient is φ = 39799966.

The previous prime is 39799961. The next prime is 39799987. The reversal of 39799967 is 76999793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39799967 - 2⁴ = 39799951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39799961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19899983 + 19899984.

It is an arithmetic number, because the mean of its divisors is an integer number (19899984).

Almost surely, 2^39799967 is an apocalyptic number.

39799967 is a deficient number, since it is larger than the sum of its proper divisors (1).

39799967 is an equidigital number, since it uses as much as digits as its factorization.

39799967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5786802, while the sum is 59.

The square root of 39799967 is about 6308.7215028086. The cubic root of 39799967 is about 341.4241503553.

The spelling of 39799967 in words is "thirty-nine million, seven hundred ninety-nine thousand, nine hundred sixty-seven".