137893621 has 4 divisors (see below), whose sum is σ = 145151200. Its totient is φ = 130636044.

The previous prime is 137893603. The next prime is 137893633. The reversal of 137893621 is 126398731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137893621 - 2⁵ = 137893589 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 (137893601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3628761 + ... + 3628798.

It is an arithmetic number, because the mean of its divisors is an integer number (36287800).

Almost surely, 2^137893621 is an apocalyptic number.

It is an amenable number.

137893621 is a deficient number, since it is larger than the sum of its proper divisors (7257579).

137893621 is an equidigital number, since it uses as much as digits as its factorization.

137893621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7257578.

The product of its digits is 54432, while the sum is 40.

The square root of 137893621 is about 11742.8114606341. The cubic root of 137893621 is about 516.6321062326.

The spelling of 137893621 in words is "one hundred thirty-seven million, eight hundred ninety-three thousand, six hundred twenty-one".