137360921 has 4 divisors (see below), whose sum is σ = 139411152. Its totient is φ = 135310692.

The previous prime is 137360917. The next prime is 137360941. The reversal of 137360921 is 129063731.

It is a happy number.

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: 129063731 = 359 ⋅359509.

It is a cyclic number.

It is not a de Polignac number, because 137360921 - 2² = 137360917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137360911) 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, 1025015 + ... + 1025148.

It is an arithmetic number, because the mean of its divisors is an integer number (34852788).

Almost surely, 2^137360921 is an apocalyptic number.

It is an amenable number.

137360921 is a deficient number, since it is larger than the sum of its proper divisors (2050231).

137360921 is an equidigital number, since it uses as much as digits as its factorization.

137360921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050230.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 137360921 is about 11720.1075507011. The cubic root of 137360921 is about 515.9659766141.

The spelling of 137360921 in words is "one hundred thirty-seven million, three hundred sixty thousand, nine hundred twenty-one".