749745391 has 16 divisors (see below), whose sum is σ = 775797120. Its totient is φ = 724243680.

The previous prime is 749745383. The next prime is 749745397. The reversal of 749745391 is 193547947.

It is a cyclic number.

It is not a de Polignac number, because 749745391 - 2³ = 749745383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749745397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1385581 + ... + 1386121.

It is an arithmetic number, because the mean of its divisors is an integer number (48487320).

Almost surely, 2^749745391 is an apocalyptic number.

749745391 is a deficient number, since it is larger than the sum of its proper divisors (26051729).

749745391 is a wasteful number, since it uses less digits than its factorization.

749745391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966.

The product of its digits is 952560, while the sum is 49.

The square root of 749745391 is about 27381.4789775863. The cubic root of 749745391 is about 908.4574725003.

The spelling of 749745391 in words is "seven hundred forty-nine million, seven hundred forty-five thousand, three hundred ninety-one".