749889331 has 4 divisors (see below), whose sum is σ = 750396472. Its totient is φ = 749382192.

The previous prime is 749889319. The next prime is 749889383. The reversal of 749889331 is 133988947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133988947 = 709 ⋅188983.

It is a cyclic number.

It is not a de Polignac number, because 749889331 - 2⁵ = 749889299 is a prime.

It is a super-2 number, since 2×749889331² = 1124668017495255122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749889391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251346 + ... + 254311.

It is an arithmetic number, because the mean of its divisors is an integer number (187599118).

Almost surely, 2^749889331 is an apocalyptic number.

749889331 is a deficient number, since it is larger than the sum of its proper divisors (507141).

749889331 is a wasteful number, since it uses less digits than its factorization.

749889331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507140.

The product of its digits is 1306368, while the sum is 52.

The square root of 749889331 is about 27384.1072704589. The cubic root of 749889331 is about 908.5156055692.

The spelling of 749889331 in words is "seven hundred forty-nine million, eight hundred eighty-nine thousand, three hundred thirty-one".