139292906 has 16 divisors (see below), whose sum is σ = 212259528. Its totient is φ = 68544000.

The previous prime is 139292897. The next prime is 139292911. The reversal of 139292906 is 609292931.

139292906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 124121881 + 15171025 = 11141^2 + 3895^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101666 + ... + 103026.

Almost surely, 2^139292906 is an apocalyptic number.

139292906 is a deficient number, since it is larger than the sum of its proper divisors (72966622).

139292906 is a wasteful number, since it uses less digits than its factorization.

139292906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 139292906 is about 11802.2415667533. The cubic root of 139292906 is about 518.3737482459.

The spelling of 139292906 in words is "one hundred thirty-nine million, two hundred ninety-two thousand, nine hundred six".