190541521 has 2 divisors, whose sum is σ = 190541522. Its totient is φ = 190541520.

The previous prime is 190541479. The next prime is 190541539. The reversal of 190541521 is 125145091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185940496 + 4601025 = 13636^2 + 2145^2 .

It is an emirp because it is prime and its reverse (125145091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190541521 - 2²³ = 182152913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190541521.

It is not a weakly prime, because it can be changed into another prime (190548521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95270760 + 95270761.

It is an arithmetic number, because the mean of its divisors is an integer number (95270761).

Almost surely, 2^190541521 is an apocalyptic number.

It is an amenable number.

190541521 is a deficient number, since it is larger than the sum of its proper divisors (1).

190541521 is an equidigital number, since it uses as much as digits as its factorization.

190541521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 190541521 is about 13803.6778070194. The cubic root of 190541521 is about 575.4353562390.

The spelling of 190541521 in words is "one hundred ninety million, five hundred forty-one thousand, five hundred twenty-one".