191424993967 has 4 divisors (see below), whose sum is σ = 195036786360. Its totient is φ = 187813201576.

The previous prime is 191424993923. The next prime is 191424993973. The reversal of 191424993967 is 769399424191.

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

It is a cyclic number.

It is not a de Polignac number, because 191424993967 - 2²⁷ = 191290776239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191424993899 and 191424993908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191424999967) 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, 1805896117 + ... + 1805896222.

It is an arithmetic number, because the mean of its divisors is an integer number (48759196590).

Almost surely, 2^191424993967 is an apocalyptic number.

191424993967 is a deficient number, since it is larger than the sum of its proper divisors (3611792393).

191424993967 is an equidigital number, since it uses as much as digits as its factorization.

191424993967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611792392.

The product of its digits is 26453952, while the sum is 64.

The spelling of 191424993967 in words is "one hundred ninety-one billion, four hundred twenty-four million, nine hundred ninety-three thousand, nine hundred sixty-seven".