139297775 has 12 divisors (see below), whose sum is σ = 180239952. Its totient is φ = 106592640.

The previous prime is 139297771. The next prime is 139297783. The reversal of 139297775 is 577792931.

It is not a de Polignac number, because 139297775 - 2² = 139297771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139297771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120554 + ... + 121703.

It is an arithmetic number, because the mean of its divisors is an integer number (15019996).

Almost surely, 2^139297775 is an apocalyptic number.

139297775 is a deficient number, since it is larger than the sum of its proper divisors (40942177).

139297775 is a wasteful number, since it uses less digits than its factorization.

139297775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242290 (or 242285 counting only the distinct ones).

The product of its digits is 833490, while the sum is 50.

The square root of 139297775 is about 11802.4478393255. The cubic root of 139297775 is about 518.3797881141.

The spelling of 139297775 in words is "one hundred thirty-nine million, two hundred ninety-seven thousand, seven hundred seventy-five".