1539879397 has 8 divisors (see below), whose sum is σ = 1863383616. Its totient is φ = 1242255552.

The previous prime is 1539879361. The next prime is 1539879413. The reversal of 1539879397 is 7939789351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1539879397 - 2¹¹ = 1539877349 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 (1539879317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6469963 + ... + 6470200.

It is an arithmetic number, because the mean of its divisors is an integer number (232922952).

Almost surely, 2^1539879397 is an apocalyptic number.

1539879397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1539879397 is a deficient number, since it is larger than the sum of its proper divisors (323504219).

1539879397 is a wasteful number, since it uses less digits than its factorization.

1539879397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12940187.

The product of its digits is 12859560, while the sum is 61.

The square root of 1539879397 is about 39241.2970861056. The cubic root of 1539879397 is about 1154.7702039663.

The spelling of 1539879397 in words is "one billion, five hundred thirty-nine million, eight hundred seventy-nine thousand, three hundred ninety-seven".