139272237 has 32 divisors (see below), whose sum is σ = 223776000. Its totient is φ = 85098816.

The previous prime is 139272229. The next prime is 139272241. The reversal of 139272237 is 732272931.

It is not a de Polignac number, because 139272237 - 2³ = 139272229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139272277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50968 + ... + 53630.

It is an arithmetic number, because the mean of its divisors is an integer number (6993000).

Almost surely, 2^139272237 is an apocalyptic number.

It is an amenable number.

139272237 is a deficient number, since it is larger than the sum of its proper divisors (84503763).

139272237 is a wasteful number, since it uses less digits than its factorization.

139272237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834 (or 2828 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 139272237 is about 11801.3658955224. The cubic root of 139272237 is about 518.3481073206.

The spelling of 139272237 in words is "one hundred thirty-nine million, two hundred seventy-two thousand, two hundred thirty-seven".