192668397 has 4 divisors (see below), whose sum is σ = 256891200. Its totient is φ = 128445596.

The previous prime is 192668383. The next prime is 192668407. The reversal of 192668397 is 793866291.

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.

It is a cyclic number.

It is not a de Polignac number, because 192668397 - 2²² = 188474093 is a prime.

It is a super-2 number, since 2×192668397² = 74242222405099218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (192668347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32111397 + ... + 32111402.

It is an arithmetic number, because the mean of its divisors is an integer number (64222800).

Almost surely, 2^192668397 is an apocalyptic number.

It is an amenable number.

192668397 is a deficient number, since it is larger than the sum of its proper divisors (64222803).

192668397 is an equidigital number, since it uses as much as digits as its factorization.

192668397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64222802.

The product of its digits is 979776, while the sum is 51.

The square root of 192668397 is about 13880.5042055395. The cubic root of 192668397 is about 577.5684939655.

The spelling of 192668397 in words is "one hundred ninety-two million, six hundred sixty-eight thousand, three hundred ninety-seven".