189907999079 has 2 divisors, whose sum is σ = 189907999080. Its totient is φ = 189907999078.

The previous prime is 189907999019. The next prime is 189907999103. The reversal of 189907999079 is 970999709981.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189907999079 is a prime.

It is a super-2 number, since 2×189907999079² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189907999009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94953999539 + 94953999540.

It is an arithmetic number, because the mean of its divisors is an integer number (94953999540).

Almost surely, 2^189907999079 is an apocalyptic number.

189907999079 is a deficient number, since it is larger than the sum of its proper divisors (1).

189907999079 is an equidigital number, since it uses as much as digits as its factorization.

189907999079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 208324872, while the sum is 77.

The spelling of 189907999079 in words is "one hundred eighty-nine billion, nine hundred seven million, nine hundred ninety-nine thousand, seventy-nine".