192985391 has 2 divisors, whose sum is σ = 192985392. Its totient is φ = 192985390.

The previous prime is 192985379. The next prime is 192985417. The reversal of 192985391 is 193589291.

192985391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-192985391 is a prime.

It is a super-2 number, since 2×192985391² = 74486722278845762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (192985301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96492695 + 96492696.

It is an arithmetic number, because the mean of its divisors is an integer number (96492696).

Almost surely, 2^192985391 is an apocalyptic number.

192985391 is a deficient number, since it is larger than the sum of its proper divisors (1).

192985391 is an equidigital number, since it uses as much as digits as its factorization.

192985391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 47.

The square root of 192985391 is about 13891.9181900845. The cubic root of 192985391 is about 577.8850749105.

The spelling of 192985391 in words is "one hundred ninety-two million, nine hundred eighty-five thousand, three hundred ninety-one".