191694413 has 2 divisors, whose sum is σ = 191694414. Its totient is φ = 191694412.

The previous prime is 191694389. The next prime is 191694467. The reversal of 191694413 is 314496191.

191694413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185558884 + 6135529 = 13622^2 + 2477^2 .

It is a cyclic number.

It is not a de Polignac number, because 191694413 - 2⁸ = 191694157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191694493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95847206 + 95847207.

It is an arithmetic number, because the mean of its divisors is an integer number (95847207).

Almost surely, 2^191694413 is an apocalyptic number.

It is an amenable number.

191694413 is a deficient number, since it is larger than the sum of its proper divisors (1).

191694413 is an equidigital number, since it uses as much as digits as its factorization.

191694413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 191694413 is about 13845.3751484024. The cubic root of 191694413 is about 576.5936012135.

The spelling of 191694413 in words is "one hundred ninety-one million, six hundred ninety-four thousand, four hundred thirteen".