742167991 has 2 divisors, whose sum is σ = 742167992. Its totient is φ = 742167990.

The previous prime is 742167983. The next prime is 742168013. The reversal of 742167991 is 199761247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 742167991 - 2³ = 742167983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742167901) 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, 371083995 + 371083996.

It is an arithmetic number, because the mean of its divisors is an integer number (371083996).

Almost surely, 2^742167991 is an apocalyptic number.

742167991 is a deficient number, since it is larger than the sum of its proper divisors (1).

742167991 is an equidigital number, since it uses as much as digits as its factorization.

742167991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 742167991 is about 27242.7603410521. The cubic root of 742167991 is about 905.3866223508.

The spelling of 742167991 in words is "seven hundred forty-two million, one hundred sixty-seven thousand, nine hundred ninety-one".