39899465 has 4 divisors (see below), whose sum is σ = 47879364. Its totient is φ = 31919568.

The previous prime is 39899443. The next prime is 39899477. The reversal of 39899465 is 56499893.

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 20043529 + 19855936 = 4477^2 + 4456^2 .

It is a cyclic number.

It is not a de Polignac number, because 39899465 - 2⁶ = 39899401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3989942 + ... + 3989951.

It is an arithmetic number, because the mean of its divisors is an integer number (11969841).

Almost surely, 2^39899465 is an apocalyptic number.

It is an amenable number.

39899465 is a deficient number, since it is larger than the sum of its proper divisors (7979899).

39899465 is an equidigital number, since it uses as much as digits as its factorization.

39899465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7979898.

The product of its digits is 2099520, while the sum is 53.

The square root of 39899465 is about 6316.6023303672. The cubic root of 39899465 is about 341.7084282353.

The spelling of 39899465 in words is "thirty-nine million, eight hundred ninety-nine thousand, four hundred sixty-five".