740634491 has 2 divisors, whose sum is σ = 740634492. Its totient is φ = 740634490.

The previous prime is 740634473. The next prime is 740634527. The reversal of 740634491 is 194436047.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-740634491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (740694491) 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, 370317245 + 370317246.

It is an arithmetic number, because the mean of its divisors is an integer number (370317246).

Almost surely, 2^740634491 is an apocalyptic number.

740634491 is a deficient number, since it is larger than the sum of its proper divisors (1).

740634491 is an equidigital number, since it uses as much as digits as its factorization.

740634491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 740634491 is about 27214.6006952151. The cubic root of 740634491 is about 904.7626092045.

The spelling of 740634491 in words is "seven hundred forty million, six hundred thirty-four thousand, four hundred ninety-one".