1539879399 has 24 divisors (see below), whose sum is σ = 2302332032. Its totient is φ = 990740160.

The previous prime is 1539879361. The next prime is 1539879413. The reversal of 1539879399 is 9939789351.

1539879399 is a `hidden beast` number, since 1 + 539 + 8 + 7 + 9 + 3 + 99 = 666.

It is not a de Polignac number, because 1539879399 - 2¹⁵ = 1539846631 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 (1539879349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96669 + ... + 111465.

Almost surely, 2^1539879399 is an apocalyptic number.

1539879399 is a deficient number, since it is larger than the sum of its proper divisors (762452633).

1539879399 is a wasteful number, since it uses less digits than its factorization.

1539879399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15207 (or 15204 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 63.

The square root of 1539879399 is about 39241.2971115890. The cubic root of 1539879399 is about 1154.7702044663.

The spelling of 1539879399 in words is "one billion, five hundred thirty-nine million, eight hundred seventy-nine thousand, three hundred ninety-nine".