39399487 has 16 divisors (see below), whose sum is σ = 42517440. Its totient is φ = 36433152.

The previous prime is 39399469. The next prime is 39399491. The reversal of 39399487 is 78499393.

39399487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 39399487 - 2⁷ = 39399359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39399427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78078 + ... + 78580.

It is an arithmetic number, because the mean of its divisors is an integer number (2657340).

Almost surely, 2^39399487 is an apocalyptic number.

39399487 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

39399487 is a deficient number, since it is larger than the sum of its proper divisors (3117953).

39399487 is a wasteful number, since it uses less digits than its factorization.

39399487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its digits is 1469664, while the sum is 52.

The square root of 39399487 is about 6276.9010666092. The cubic root of 39399487 is about 340.2751146981.

The spelling of 39399487 in words is "thirty-nine million, three hundred ninety-nine thousand, four hundred eighty-seven".