190937621 has 4 divisors (see below), whose sum is σ = 218214432. Its totient is φ = 163660812.

The previous prime is 190937573. The next prime is 190937627. The reversal of 190937621 is 126739091.

It is a happy number.

190937621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 126739091 = 83 ⋅1526977.

It is a de Polignac number, because none of the positive numbers 2^k-190937621 is a prime.

It is a super-2 number, since 2×190937621² = 72914350226279282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190937627) 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, 13638395 + ... + 13638408.

It is an arithmetic number, because the mean of its divisors is an integer number (54553608).

Almost surely, 2^190937621 is an apocalyptic number.

It is an amenable number.

190937621 is a deficient number, since it is larger than the sum of its proper divisors (27276811).

190937621 is an equidigital number, since it uses as much as digits as its factorization.

190937621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27276810.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 190937621 is about 13818.0179837776. The cubic root of 190937621 is about 575.8338208962.

The spelling of 190937621 in words is "one hundred ninety million, nine hundred thirty-seven thousand, six hundred twenty-one".