740639791 has 2 divisors, whose sum is σ = 740639792. Its totient is φ = 740639790.

The previous prime is 740639789. The next prime is 740639797. The reversal of 740639791 is 197936047.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 740639791 - 2¹ = 740639789 is a prime.

Together with 740639789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (740639797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370319895 + 370319896.

It is an arithmetic number, because the mean of its divisors is an integer number (370319896).

Almost surely, 2^740639791 is an apocalyptic number.

740639791 is a deficient number, since it is larger than the sum of its proper divisors (1).

740639791 is an equidigital number, since it uses as much as digits as its factorization.

740639791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 740639791 is about 27214.6980692419. The cubic root of 740639791 is about 904.7647673678.

The spelling of 740639791 in words is "seven hundred forty million, six hundred thirty-nine thousand, seven hundred ninety-one".