191079401 has 4 divisors (see below), whose sum is σ = 195523152. Its totient is φ = 186635652.

The previous prime is 191079397. The next prime is 191079403. The reversal of 191079401 is 104970191.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104970191 = 193 ⋅543887.

It is not a de Polignac number, because 191079401 - 2² = 191079397 is a prime.

It is a super-2 number, since 2×191079401² = 73022674973037602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191079403) 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, 2221811 + ... + 2221896.

It is an arithmetic number, because the mean of its divisors is an integer number (48880788).

Almost surely, 2^191079401 is an apocalyptic number.

It is an amenable number.

191079401 is a deficient number, since it is larger than the sum of its proper divisors (4443751).

191079401 is an equidigital number, since it uses as much as digits as its factorization.

191079401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443750.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 191079401 is about 13823.1472899626. The cubic root of 191079401 is about 575.9763133666.

The spelling of 191079401 in words is "one hundred ninety-one million, seventy-nine thousand, four hundred one".