139896237 has 16 divisors (see below), whose sum is σ = 201165440. Its totient is φ = 85966272.

The previous prime is 139896233. The next prime is 139896269. The reversal of 139896237 is 732698931.

139896237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139896237 - 2² = 139896233 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139896233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30168 + ... + 34494.

It is an arithmetic number, because the mean of its divisors is an integer number (12572840).

Almost surely, 2^139896237 is an apocalyptic number.

It is an amenable number.

139896237 is a deficient number, since it is larger than the sum of its proper divisors (61269203).

139896237 is a wasteful number, since it uses less digits than its factorization.

139896237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5172.

The product of its digits is 489888, while the sum is 48.

The square root of 139896237 is about 11827.7739663894. The cubic root of 139896237 is about 519.1210954397.

The spelling of 139896237 in words is "one hundred thirty-nine million, eight hundred ninety-six thousand, two hundred thirty-seven".