39139417 has 4 divisors (see below), whose sum is σ = 40049680. Its totient is φ = 38229156.

The previous prime is 39139409. The next prime is 39139447. The reversal of 39139417 is 71493193.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71493193 = 4049 ⋅17657.

It is a cyclic number.

It is not a de Polignac number, because 39139417 - 2³ = 39139409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39139447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455067 + ... + 455152.

It is an arithmetic number, because the mean of its divisors is an integer number (10012420).

Almost surely, 2^39139417 is an apocalyptic number.

It is an amenable number.

39139417 is a deficient number, since it is larger than the sum of its proper divisors (910263).

39139417 is an equidigital number, since it uses as much as digits as its factorization.

39139417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910262.

The product of its digits is 20412, while the sum is 37.

The square root of 39139417 is about 6256.1503338715. The cubic root of 39139417 is about 339.5247599110.

The spelling of 39139417 in words is "thirty-nine million, one hundred thirty-nine thousand, four hundred seventeen".