139481816 has 16 divisors (see below), whose sum is σ = 261893400. Its totient is φ = 69643584.

The previous prime is 139481813. The next prime is 139481819. The reversal of 139481816 is 618184931.

It is an interprime number because it is at equal distance from previous prime (139481813) and next prime (139481819).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139481813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5885 + ... + 17708.

Almost surely, 2^139481816 is an apocalyptic number.

It is an amenable number.

139481816 is a deficient number, since it is larger than the sum of its proper divisors (122411584).

139481816 is a wasteful number, since it uses less digits than its factorization.

139481816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24338 (or 24334 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 139481816 is about 11810.2419958272. The cubic root of 139481816 is about 518.6079830720.

The spelling of 139481816 in words is "one hundred thirty-nine million, four hundred eighty-one thousand, eight hundred sixteen".