139979916 has 54 divisors (see below), whose sum is σ = 373476012. Its totient is φ = 44200080.

The previous prime is 139979899. The next prime is 139979947. The reversal of 139979916 is 619979931.

139979916 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 17 ways as a sum of consecutive naturals, for example, 7611 + ... + 18381.

Almost surely, 2^139979916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139979916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186738006).

139979916 is an abundant number, since it is smaller than the sum of its proper divisors (233496096).

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

139979916 is a wasteful number, since it uses less digits than its factorization.

139979916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10819 (or 10795 counting only the distinct ones).

The product of its digits is 826686, while the sum is 54.

The square root of 139979916 is about 11831.3108318563. The cubic root of 139979916 is about 519.2245789854.

The spelling of 139979916 in words is "one hundred thirty-nine million, nine hundred seventy-nine thousand, nine hundred sixteen".