191007073 has 4 divisors (see below), whose sum is σ = 191035908. Its totient is φ = 190978240.

The previous prime is 191007049. The next prime is 191007199. The reversal of 191007073 is 370700191.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 151216209 + 39790864 = 12297^2 + 6308^2 .

It is a cyclic number.

It is not a de Polignac number, because 191007073 - 2⁹ = 191006561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191007673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053 + ... + 19573.

It is an arithmetic number, because the mean of its divisors is an integer number (47758977).

Almost surely, 2^191007073 is an apocalyptic number.

It is an amenable number.

191007073 is a deficient number, since it is larger than the sum of its proper divisors (28835).

191007073 is a wasteful number, since it uses less digits than its factorization.

191007073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28834.

The product of its (nonzero) digits is 1323, while the sum is 28.

The square root of 191007073 is about 13820.5308508754. The cubic root of 191007073 is about 575.9036307156.

The spelling of 191007073 in words is "one hundred ninety-one million, seven thousand, seventy-three".