137991933 has 12 divisors (see below), whose sum is σ = 200517408. Its totient is φ = 91442760.

The previous prime is 137991923. The next prime is 137991949. The reversal of 137991933 is 339199731.

It is not a de Polignac number, because 137991933 - 2⁵ = 137991901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137991923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44403 + ... + 47408.

It is an arithmetic number, because the mean of its divisors is an integer number (16709784).

Almost surely, 2^137991933 is an apocalyptic number.

It is an amenable number.

137991933 is a deficient number, since it is larger than the sum of its proper divisors (62525475).

137991933 is a wasteful number, since it uses less digits than its factorization.

137991933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91984 (or 91981 counting only the distinct ones).

The product of its digits is 137781, while the sum is 45.

The square root of 137991933 is about 11746.9967651311. The cubic root of 137991933 is about 516.7548556135.

The spelling of 137991933 in words is "one hundred thirty-seven million, nine hundred ninety-one thousand, nine hundred thirty-three".