749719391 has 2 divisors, whose sum is σ = 749719392. Its totient is φ = 749719390.

The previous prime is 749719381. The next prime is 749719393. The reversal of 749719391 is 193917947.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (193917947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 749719391 - 2²² = 745525087 is a prime.

Together with 749719393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749719393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374859695 + 374859696.

It is an arithmetic number, because the mean of its divisors is an integer number (374859696).

Almost surely, 2^749719391 is an apocalyptic number.

749719391 is a deficient number, since it is larger than the sum of its proper divisors (1).

749719391 is an equidigital number, since it uses as much as digits as its factorization.

749719391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 50.

The square root of 749719391 is about 27381.0041999924. The cubic root of 749719391 is about 908.4469710832.

The spelling of 749719391 in words is "seven hundred forty-nine million, seven hundred nineteen thousand, three hundred ninety-one".