191612959 has 2 divisors, whose sum is σ = 191612960. Its totient is φ = 191612958.

The previous prime is 191612903. The next prime is 191612963. The reversal of 191612959 is 959216191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191612959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191612969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95806479 + 95806480.

It is an arithmetic number, because the mean of its divisors is an integer number (95806480).

Almost surely, 2^191612959 is an apocalyptic number.

191612959 is a deficient number, since it is larger than the sum of its proper divisors (1).

191612959 is an equidigital number, since it uses as much as digits as its factorization.

191612959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 43.

The square root of 191612959 is about 13842.4332759815. The cubic root of 191612959 is about 576.5119217178.

The spelling of 191612959 in words is "one hundred ninety-one million, six hundred twelve thousand, nine hundred fifty-nine".