39279987 has 12 divisors (see below), whose sum is σ = 57101200. Its totient is φ = 26018928.

The previous prime is 39279983. The next prime is 39279991. The reversal of 39279987 is 78997293.

It is an interprime number because it is at equal distance from previous prime (39279983) and next prime (39279991).

It is not a de Polignac number, because 39279987 - 2² = 39279983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39279983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12487 + ... + 15312.

Almost surely, 2^39279987 is an apocalyptic number.

39279987 is a deficient number, since it is larger than the sum of its proper divisors (17821213).

39279987 is a wasteful number, since it uses less digits than its factorization.

39279987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27962 (or 27959 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 39279987 is about 6267.3748092802. The cubic root of 39279987 is about 339.9307442562.

The spelling of 39279987 in words is "thirty-nine million, two hundred seventy-nine thousand, nine hundred eighty-seven".