190490977 has 2 divisors, whose sum is σ = 190490978. Its totient is φ = 190490976.

The previous prime is 190490897. The next prime is 190491019. The reversal of 190490977 is 779094091.

190490977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127780416 + 62710561 = 11304^2 + 7919^2 .

It is an emirp because it is prime and its reverse (779094091) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190490977 is a prime.

It is not a weakly prime, because it can be changed into another prime (190490077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95245488 + 95245489.

It is an arithmetic number, because the mean of its divisors is an integer number (95245489).

Almost surely, 2^190490977 is an apocalyptic number.

190490977 is the 7969-th hex number.

It is an amenable number.

190490977 is a deficient number, since it is larger than the sum of its proper divisors (1).

190490977 is an equidigital number, since it uses as much as digits as its factorization.

190490977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 190490977 is about 13801.8468691694. The cubic root of 190490977 is about 575.3844707826.

The spelling of 190490977 in words is "one hundred ninety million, four hundred ninety thousand, nine hundred seventy-seven".