191493629 has 2 divisors, whose sum is σ = 191493630. Its totient is φ = 191493628.

The previous prime is 191493619. The next prime is 191493637. The reversal of 191493629 is 926394191.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126045529 + 65448100 = 11227^2 + 8090^2 .

It is a cyclic number.

It is not a de Polignac number, because 191493629 - 2¹⁶ = 191428093 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 191493629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191493619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95746814 + 95746815.

It is an arithmetic number, because the mean of its divisors is an integer number (95746815).

Almost surely, 2^191493629 is an apocalyptic number.

It is an amenable number.

191493629 is a deficient number, since it is larger than the sum of its proper divisors (1).

191493629 is an equidigital number, since it uses as much as digits as its factorization.

191493629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The square root of 191493629 is about 13838.1223075965. The cubic root of 191493629 is about 576.3922195605.

The spelling of 191493629 in words is "one hundred ninety-one million, four hundred ninety-three thousand, six hundred twenty-nine".