137383621 has 4 divisors (see below), whose sum is σ = 137408544. Its totient is φ = 137358700.

The previous prime is 137383619. The next prime is 137383633. The reversal of 137383621 is 126383731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126383731 = 7477 ⋅16903.

It is a cyclic number.

It is not a de Polignac number, because 137383621 - 2¹ = 137383619 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 (137383691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115 + ... + 16576.

It is an arithmetic number, because the mean of its divisors is an integer number (34352136).

Almost surely, 2^137383621 is an apocalyptic number.

It is an amenable number.

137383621 is a deficient number, since it is larger than the sum of its proper divisors (24923).

137383621 is an equidigital number, since it uses as much as digits as its factorization.

137383621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24922.

The product of its digits is 18144, while the sum is 34.

The square root of 137383621 is about 11721.0759318418. The cubic root of 137383621 is about 515.9943975615.

The spelling of 137383621 in words is "one hundred thirty-seven million, three hundred eighty-three thousand, six hundred twenty-one".