39493879 has 2 divisors, whose sum is σ = 39493880. Its totient is φ = 39493878.

The previous prime is 39493859. The next prime is 39493889. The reversal of 39493879 is 97839493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39493879 - 2⁵ = 39493847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39493849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19746939 + 19746940.

It is an arithmetic number, because the mean of its divisors is an integer number (19746940).

Almost surely, 2^39493879 is an apocalyptic number.

39493879 is a deficient number, since it is larger than the sum of its proper divisors (1).

39493879 is an equidigital number, since it uses as much as digits as its factorization.

39493879 is an evil number, because the sum of its binary digits is even.

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

The square root of 39493879 is about 6284.4155655081. The cubic root of 39493879 is about 340.5466379681.

The spelling of 39493879 in words is "thirty-nine million, four hundred ninety-three thousand, eight hundred seventy-nine".