139797816 has 32 divisors (see below), whose sum is σ = 357624960. Its totient is φ = 45515232.

The previous prime is 139797799. The next prime is 139797821. The reversal of 139797816 is 618797931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66700 + ... + 68763.

It is an arithmetic number, because the mean of its divisors is an integer number (11175780).

Almost surely, 2^139797816 is an apocalyptic number.

It is an amenable number.

139797816 is an abundant number, since it is smaller than the sum of its proper divisors (217827144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139797816 is a wasteful number, since it uses less digits than its factorization.

139797816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135515 (or 135511 counting only the distinct ones).

The product of its digits is 571536, while the sum is 51.

The square root of 139797816 is about 11823.6126458879. The cubic root of 139797816 is about 518.9993280385. Note that the first 3 decimals are identical.

The spelling of 139797816 in words is "one hundred thirty-nine million, seven hundred ninety-seven thousand, eight hundred sixteen".