139299506 has 8 divisors (see below), whose sum is σ = 210280620. Its totient is φ = 69205968.

The previous prime is 139299497. The next prime is 139299533. The reversal of 139299506 is 605992931.

It can be written as a sum of positive squares in 2 ways, for example, as 135932281 + 3367225 = 11659^2 + 1835^2 .

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

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, 221501 + ... + 222128.

Almost surely, 2^139299506 is an apocalyptic number.

139299506 is a deficient number, since it is larger than the sum of its proper divisors (70981114).

139299506 is a wasteful number, since it uses less digits than its factorization.

139299506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443788.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 139299506 is about 11802.5211713430. The cubic root of 139299506 is about 518.3819353408.

The spelling of 139299506 in words is "one hundred thirty-nine million, two hundred ninety-nine thousand, five hundred six".