139816839 has 16 divisors (see below), whose sum is σ = 204768000. Its totient is φ = 84465216.

The previous prime is 139816837. The next prime is 139816841. The reversal of 139816839 is 938618931.

It is an interprime number because it is at equal distance from previous prime (139816837) and next prime (139816841).

It is not a de Polignac number, because 139816839 - 2¹ = 139816837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139816837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52014 + ... + 54635.

It is an arithmetic number, because the mean of its divisors is an integer number (12798000).

Almost surely, 2^139816839 is an apocalyptic number.

139816839 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139816839 is a deficient number, since it is larger than the sum of its proper divisors (64951161).

139816839 is a wasteful number, since it uses less digits than its factorization.

139816839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106694.

The product of its digits is 279936, while the sum is 48.

The square root of 139816839 is about 11824.4170680842. The cubic root of 139816839 is about 519.0228679304.

The spelling of 139816839 in words is "one hundred thirty-nine million, eight hundred sixteen thousand, eight hundred thirty-nine".