190874569 has 2 divisors, whose sum is σ = 190874570. Its totient is φ = 190874568.

The previous prime is 190874543. The next prime is 190874573. The reversal of 190874569 is 965478091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190108944 + 765625 = 13788^2 + 875^2 .

It is an emirp because it is prime and its reverse (965478091) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190874569 is a prime.

It is a super-2 number, since 2×190874569² = 72866202181871522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190874669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95437284 + 95437285.

It is an arithmetic number, because the mean of its divisors is an integer number (95437285).

Almost surely, 2^190874569 is an apocalyptic number.

It is an amenable number.

190874569 is a deficient number, since it is larger than the sum of its proper divisors (1).

190874569 is an equidigital number, since it uses as much as digits as its factorization.

190874569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 190874569 is about 13815.7362815016. The cubic root of 190874569 is about 575.7704293880.

The spelling of 190874569 in words is "one hundred ninety million, eight hundred seventy-four thousand, five hundred sixty-nine".