139339850 has 36 divisors (see below), whose sum is σ = 279712566. Its totient is φ = 51337440.

The previous prime is 139339831. The next prime is 139339877. The reversal of 139339850 is 58933931.

It can be written as a sum of positive squares in 3 ways, for example, as 77387209 + 61952641 = 8797^2 + 7871^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 139339798 and 139339807.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 300719 + ... + 301181.

Almost surely, 2^139339850 is an apocalyptic number.

139339850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139339850 is an abundant number, since it is smaller than the sum of its proper divisors (140372716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139339850 is an equidigital number, since it uses as much as digits as its factorization.

139339850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 139339850 is about 11804.2301739673. The cubic root of 139339850 is about 518.4319751979.

The spelling of 139339850 in words is "one hundred thirty-nine million, three hundred thirty-nine thousand, eight hundred fifty".