191137073 has 2 divisors, whose sum is σ = 191137074. Its totient is φ = 191137072.

The previous prime is 191137007. The next prime is 191137097. The reversal of 191137073 is 370731191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165045409 + 26091664 = 12847^2 + 5108^2 .

It is a cyclic number.

It is not a de Polignac number, because 191137073 - 2⁸ = 191136817 is a prime.

It is not a weakly prime, because it can be changed into another prime (191139073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95568536 + 95568537.

It is an arithmetic number, because the mean of its divisors is an integer number (95568537).

Almost surely, 2^191137073 is an apocalyptic number.

It is an amenable number.

191137073 is a deficient number, since it is larger than the sum of its proper divisors (1).

191137073 is an equidigital number, since it uses as much as digits as its factorization.

191137073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 32.

The square root of 191137073 is about 13825.2331987565. The cubic root of 191137073 is about 576.0342550117.

The spelling of 191137073 in words is "one hundred ninety-one million, one hundred thirty-seven thousand, seventy-three".