192426991 has 4 divisors (see below), whose sum is σ = 192486112. Its totient is φ = 192367872.

The previous prime is 192426959. The next prime is 192427031. The reversal of 192426991 is 199624291.

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 192426991 - 2⁵ = 192426959 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 (192426911) 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, 24375 + ... + 31288.

It is an arithmetic number, because the mean of its divisors is an integer number (48121528).

Almost surely, 2^192426991 is an apocalyptic number.

192426991 is a deficient number, since it is larger than the sum of its proper divisors (59121).

192426991 is an equidigital number, since it uses as much as digits as its factorization.

192426991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59120.

The product of its digits is 69984, while the sum is 43.

The square root of 192426991 is about 13871.8056142667. The cubic root of 192426991 is about 577.3271695356.

The spelling of 192426991 in words is "one hundred ninety-two million, four hundred twenty-six thousand, nine hundred ninety-one".