192447991 has 2 divisors, whose sum is σ = 192447992. Its totient is φ = 192447990.

The previous prime is 192447949. The next prime is 192448019. The reversal of 192447991 is 199744291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 192447991 - 2¹³ = 192439799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (192447901) 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, 96223995 + 96223996.

It is an arithmetic number, because the mean of its divisors is an integer number (96223996).

Almost surely, 2^192447991 is an apocalyptic number.

192447991 is a deficient number, since it is larger than the sum of its proper divisors (1).

192447991 is an equidigital number, since it uses as much as digits as its factorization.

192447991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 192447991 is about 13872.5625246383. The cubic root of 192447991 is about 577.3481704521.

The spelling of 192447991 in words is "one hundred ninety-two million, four hundred forty-seven thousand, nine hundred ninety-one".