191381007 has 4 divisors (see below), whose sum is σ = 255174680. Its totient is φ = 127587336.

The previous prime is 191380993. The next prime is 191381017. The reversal of 191381007 is 700183191.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 191381007 - 2⁴ = 191380991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191381017) 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, 31896832 + ... + 31896837.

It is an arithmetic number, because the mean of its divisors is an integer number (63793670).

Almost surely, 2^191381007 is an apocalyptic number.

191381007 is a deficient number, since it is larger than the sum of its proper divisors (63793673).

191381007 is an equidigital number, since it uses as much as digits as its factorization.

191381007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63793672.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 191381007 is about 13834.0524431563. The cubic root of 191381007 is about 576.2792007011.

The spelling of 191381007 in words is "one hundred ninety-one million, three hundred eighty-one thousand, seven".