190135621 has 8 divisors (see below), whose sum is σ = 204968960. Its totient is φ = 175331952.

The previous prime is 190135609. The next prime is 190135651. The reversal of 190135621 is 126531091.

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 190135621 - 2²¹ = 188038469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190135621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190135651) 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, 6940 + ... + 20698.

It is an arithmetic number, because the mean of its divisors is an integer number (25621120).

Almost surely, 2^190135621 is an apocalyptic number.

It is an amenable number.

190135621 is a deficient number, since it is larger than the sum of its proper divisors (14833339).

190135621 is a wasteful number, since it uses less digits than its factorization.

190135621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14835.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 190135621 is about 13788.9673652526. The cubic root of 190135621 is about 575.0264597780.

The spelling of 190135621 in words is "one hundred ninety million, one hundred thirty-five thousand, six hundred twenty-one".