190379621 has 2 divisors, whose sum is σ = 190379622. Its totient is φ = 190379620.

The previous prime is 190379593. The next prime is 190379627. The reversal of 190379621 is 126973091.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184552225 + 5827396 = 13585^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 190379621 - 2⁶ = 190379557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190379627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95189810 + 95189811.

It is an arithmetic number, because the mean of its divisors is an integer number (95189811).

Almost surely, 2^190379621 is an apocalyptic number.

It is an amenable number.

190379621 is a deficient number, since it is larger than the sum of its proper divisors (1).

190379621 is an equidigital number, since it uses as much as digits as its factorization.

190379621 is an evil number, because the sum of its binary digits is even.

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

The square root of 190379621 is about 13797.8121816468. The cubic root of 190379621 is about 575.2723307341.

The spelling of 190379621 in words is "one hundred ninety million, three hundred seventy-nine thousand, six hundred twenty-one".