139137290 has 8 divisors (see below), whose sum is σ = 250447140. Its totient is φ = 55654912.

The previous prime is 139137287. The next prime is 139137307. The reversal of 139137290 is 92731931.

It can be written as a sum of positive squares in 2 ways, for example, as 133934329 + 5202961 = 11573^2 + 2281^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 139137290.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6956855 + ... + 6956874.

Almost surely, 2^139137290 is an apocalyptic number.

139137290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139137290 is a deficient number, since it is larger than the sum of its proper divisors (111309850).

139137290 is a wasteful number, since it uses less digits than its factorization.

139137290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13913736.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 139137290 is about 11795.6470784777. The cubic root of 139137290 is about 518.1806364542.

The spelling of 139137290 in words is "one hundred thirty-nine million, one hundred thirty-seven thousand, two hundred ninety".