190919761 has 2 divisors, whose sum is σ = 190919762. Its totient is φ = 190919760.

The previous prime is 190919737. The next prime is 190919767. The reversal of 190919761 is 167919091.

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., 190854225 + 65536 = 13815^2 + 256^2 .

It is an emirp because it is prime and its reverse (167919091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190919761 - 2¹⁹ = 190395473 is a prime.

It is not a weakly prime, because it can be changed into another prime (190919767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95459880 + 95459881.

It is an arithmetic number, because the mean of its divisors is an integer number (95459881).

Almost surely, 2^190919761 is an apocalyptic number.

It is an amenable number.

190919761 is a deficient number, since it is larger than the sum of its proper divisors (1).

190919761 is an equidigital number, since it uses as much as digits as its factorization.

190919761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 43.

The square root of 190919761 is about 13817.3717110021. The cubic root of 190919761 is about 575.8158661446.

The spelling of 190919761 in words is "one hundred ninety million, nine hundred nineteen thousand, seven hundred sixty-one".