39490879 has 4 divisors (see below), whose sum is σ = 39752560. Its totient is φ = 39229200.

The previous prime is 39490853. The next prime is 39490889. The reversal of 39490879 is 97809493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97809493 = 1553 ⋅62981.

It is a cyclic number.

It is not a de Polignac number, because 39490879 - 2⁷ = 39490751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39490889) 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, 130614 + ... + 130915.

It is an arithmetic number, because the mean of its divisors is an integer number (9938140).

Almost surely, 2^39490879 is an apocalyptic number.

39490879 is a deficient number, since it is larger than the sum of its proper divisors (261681).

39490879 is a wasteful number, since it uses less digits than its factorization.

39490879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261680.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 39490879 is about 6284.1768752956. The cubic root of 39490879 is about 340.5380149797.

The spelling of 39490879 in words is "thirty-nine million, four hundred ninety thousand, eight hundred seventy-nine".