191950513 has 2 divisors, whose sum is σ = 191950514. Its totient is φ = 191950512.

The previous prime is 191950463. The next prime is 191950523. The reversal of 191950513 is 315059191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125821089 + 66129424 = 11217^2 + 8132^2 .

It is a cyclic number.

It is not a de Polignac number, because 191950513 - 2⁹ = 191950001 is a prime.

It is not a weakly prime, because it can be changed into another prime (191950523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95975256 + 95975257.

It is an arithmetic number, because the mean of its divisors is an integer number (95975257).

Almost surely, 2^191950513 is an apocalyptic number.

It is an amenable number.

191950513 is a deficient number, since it is larger than the sum of its proper divisors (1).

191950513 is an equidigital number, since it uses as much as digits as its factorization.

191950513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6075, while the sum is 34.

The square root of 191950513 is about 13854.6206371737. The cubic root of 191950513 is about 576.8502595554.

The spelling of 191950513 in words is "one hundred ninety-one million, nine hundred fifty thousand, five hundred thirteen".