137201621 has 8 divisors (see below), whose sum is σ = 140771904. Its totient is φ = 133642080.

The previous prime is 137201579. The next prime is 137201657. The reversal of 137201621 is 126102731.

137201621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137201621 - 2⁶ = 137201557 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 (137201681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27506 + ... + 32108.

It is an arithmetic number, because the mean of its divisors is an integer number (17596488).

Almost surely, 2^137201621 is an apocalyptic number.

It is an amenable number.

137201621 is a deficient number, since it is larger than the sum of its proper divisors (3570283).

137201621 is an equidigital number, since it uses as much as digits as its factorization.

137201621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5371.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 137201621 is about 11713.3095664718. The cubic root of 137201621 is about 515.7664410313.

The spelling of 137201621 in words is "one hundred thirty-seven million, two hundred one thousand, six hundred twenty-one".