742247791 has 2 divisors, whose sum is σ = 742247792. Its totient is φ = 742247790.

The previous prime is 742247777. The next prime is 742247827. The reversal of 742247791 is 197742247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 742247791 - 2²⁹ = 205376879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742247771) 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 as a sum of consecutive naturals, namely, 371123895 + 371123896.

It is an arithmetic number, because the mean of its divisors is an integer number (371123896).

Almost surely, 2^742247791 is an apocalyptic number.

742247791 is a deficient number, since it is larger than the sum of its proper divisors (1).

742247791 is an equidigital number, since it uses as much as digits as its factorization.

742247791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 43.

The square root of 742247791 is about 27244.2249109788. The cubic root of 742247791 is about 905.4190710973.

The spelling of 742247791 in words is "seven hundred forty-two million, two hundred forty-seven thousand, seven hundred ninety-one".