139297774 has 16 divisors (see below), whose sum is σ = 260505216. Its totient is φ = 54271800.

The previous prime is 139297771. The next prime is 139297783. The reversal of 139297774 is 477792931.

139297774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 452112 + ... + 452419.

It is an arithmetic number, because the mean of its divisors is an integer number (16281576).

Almost surely, 2^139297774 is an apocalyptic number.

139297774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

139297774 is a deficient number, since it is larger than the sum of its proper divisors (121207442).

139297774 is a wasteful number, since it uses less digits than its factorization.

139297774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904551.

The product of its digits is 666792, while the sum is 49.

The square root of 139297774 is about 11802.4477969614. The cubic root of 139297774 is about 518.3797868737.

The spelling of 139297774 in words is "one hundred thirty-nine million, two hundred ninety-seven thousand, seven hundred seventy-four".