749898989 has 12 divisors (see below), whose sum is σ = 872784000. Its totient is φ = 642437208.

The previous prime is 749898977. The next prime is 749899009. The reversal of 749898989 is 989898947.

It is not a de Polignac number, because 749898989 - 2²⁰ = 748850413 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749898089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159332 + ... + 163970.

It is an arithmetic number, because the mean of its divisors is an integer number (72732000).

Almost surely, 2^749898989 is an apocalyptic number.

It is an amenable number.

749898989 is a deficient number, since it is larger than the sum of its proper divisors (122885011).

749898989 is a wasteful number, since it uses less digits than its factorization.

749898989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7952 (or 7945 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 71.

The square root of 749898989 is about 27384.2836130508. The cubic root of 749898989 is about 908.5195058807.

The spelling of 749898989 in words is "seven hundred forty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-nine".