190578961 has 2 divisors, whose sum is σ = 190578962. Its totient is φ = 190578960.

The previous prime is 190578929. The next prime is 190578991. The reversal of 190578961 is 169875091.

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., 189888400 + 690561 = 13780^2 + 831^2 .

It is an emirp because it is prime and its reverse (169875091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190578961 - 2⁵ = 190578929 is a prime.

It is not a weakly prime, because it can be changed into another prime (190578901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95289480 + 95289481.

It is an arithmetic number, because the mean of its divisors is an integer number (95289481).

Almost surely, 2^190578961 is an apocalyptic number.

It is an amenable number.

190578961 is a deficient number, since it is larger than the sum of its proper divisors (1).

190578961 is an equidigital number, since it uses as much as digits as its factorization.

190578961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 190578961 is about 13805.0339007190. The cubic root of 190578961 is about 575.4730433682.

The spelling of 190578961 in words is "one hundred ninety million, five hundred seventy-eight thousand, nine hundred sixty-one".