749397987 has 20 divisors (see below), whose sum is σ = 1205585920. Its totient is φ = 461167344.

The previous prime is 749397949. The next prime is 749397989. The reversal of 749397987 is 789793947.

It is not a de Polignac number, because 749397987 - 2⁶ = 749397923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749397989) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 354787 + ... + 356892.

It is an arithmetic number, because the mean of its divisors is an integer number (60279296).

Almost surely, 2^749397987 is an apocalyptic number.

749397987 is a deficient number, since it is larger than the sum of its proper divisors (456187933).

749397987 is a wasteful number, since it uses less digits than its factorization.

749397987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711704 (or 711695 counting only the distinct ones).

The product of its digits is 24004512, while the sum is 63.

The square root of 749397987 is about 27375.1344654232. The cubic root of 749397987 is about 908.3171357397.

The spelling of 749397987 in words is "seven hundred forty-nine million, three hundred ninety-seven thousand, nine hundred eighty-seven".