192138407 has 2 divisors, whose sum is σ = 192138408. Its totient is φ = 192138406.

The previous prime is 192138391. The next prime is 192138439. The reversal of 192138407 is 704831291.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 192138407 - 2⁴ = 192138391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (192138467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96069203 + 96069204.

It is an arithmetic number, because the mean of its divisors is an integer number (96069204).

Almost surely, 2^192138407 is an apocalyptic number.

192138407 is a deficient number, since it is larger than the sum of its proper divisors (1).

192138407 is an equidigital number, since it uses as much as digits as its factorization.

192138407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 192138407 is about 13861.3998932287. The cubic root of 192138407 is about 577.0384180462.

Adding to 192138407 its reverse (704831291), we get a palindrome (896969698).

The spelling of 192138407 in words is "one hundred ninety-two million, one hundred thirty-eight thousand, four hundred seven".