139451916 has 24 divisors (see below), whose sum is σ = 325592064. Its totient is φ = 46454800.

The previous prime is 139451909. The next prime is 139451933. The reversal of 139451916 is 619154931.

139451916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25741 + ... + 30683.

It is an arithmetic number, because the mean of its divisors is an integer number (13566336).

Almost surely, 2^139451916 is an apocalyptic number.

It is an amenable number.

139451916 is an abundant number, since it is smaller than the sum of its proper divisors (186140148).

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

139451916 is a wasteful number, since it uses less digits than its factorization.

139451916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7301 (or 7299 counting only the distinct ones).

The product of its digits is 29160, while the sum is 39.

The square root of 139451916 is about 11808.9760775437. The cubic root of 139451916 is about 518.5709233144.

The spelling of 139451916 in words is "one hundred thirty-nine million, four hundred fifty-one thousand, nine hundred sixteen".