191002073 has 2 divisors, whose sum is σ = 191002074. Its totient is φ = 191002072.

The previous prime is 191002043. The next prime is 191002093. The reversal of 191002073 is 370200191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174583369 + 16418704 = 13213^2 + 4052^2 .

It is a cyclic number.

It is not a de Polignac number, because 191002073 - 2¹⁰ = 191001049 is a prime.

It is not a weakly prime, because it can be changed into another prime (191002043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95501036 + 95501037.

It is an arithmetic number, because the mean of its divisors is an integer number (95501037).

Almost surely, 2^191002073 is an apocalyptic number.

It is an amenable number.

191002073 is a deficient number, since it is larger than the sum of its proper divisors (1).

191002073 is an equidigital number, since it uses as much as digits as its factorization.

191002073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 191002073 is about 13820.3499593896. The cubic root of 191002073 is about 575.8986055207.

The spelling of 191002073 in words is "one hundred ninety-one million, two thousand, seventy-three".