190889562779 has 2 divisors, whose sum is σ = 190889562780. Its totient is φ = 190889562778.

The previous prime is 190889562757. The next prime is 190889562791. The reversal of 190889562779 is 977265988091.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190889562779 is a prime.

It is a super-3 number, since 3×190889562779³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (190889562979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95444781389 + 95444781390.

It is an arithmetic number, because the mean of its divisors is an integer number (95444781390).

Almost surely, 2^190889562779 is an apocalyptic number.

190889562779 is a deficient number, since it is larger than the sum of its proper divisors (1).

190889562779 is an equidigital number, since it uses as much as digits as its factorization.

190889562779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137168640, while the sum is 71.

The spelling of 190889562779 in words is "one hundred ninety billion, eight hundred eighty-nine million, five hundred sixty-two thousand, seven hundred seventy-nine".