137893121 has 4 divisors (see below), whose sum is σ = 140494932. Its totient is φ = 135291312.

The previous prime is 137893111. The next prime is 137893141. The reversal of 137893121 is 121398731.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41460721 + 96432400 = 6439^2 + 9820^2 .

It is a cyclic number.

It is not a de Polignac number, because 137893121 - 2²⁶ = 70784257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137893111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300826 + ... + 1300931.

It is an arithmetic number, because the mean of its divisors is an integer number (35123733).

Almost surely, 2^137893121 is an apocalyptic number.

It is an amenable number.

137893121 is a deficient number, since it is larger than the sum of its proper divisors (2601811).

137893121 is an equidigital number, since it uses as much as digits as its factorization.

137893121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601810.

The product of its digits is 9072, while the sum is 35.

The square root of 137893121 is about 11742.7901709943. The cubic root of 137893121 is about 516.6314817987.

The spelling of 137893121 in words is "one hundred thirty-seven million, eight hundred ninety-three thousand, one hundred twenty-one".