749017189 has 4 divisors (see below), whose sum is σ = 754044300. Its totient is φ = 743990080.

The previous prime is 749017177. The next prime is 749017237. The reversal of 749017189 is 981710947.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47032164 + 701985025 = 6858^2 + 26495^2 .

It is a cyclic number.

It is not a de Polignac number, because 749017189 - 2²⁵ = 715462757 is a prime.

It is a super-2 number, since 2×749017189² = 1122053498834923442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749027189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2513332 + ... + 2513629.

It is an arithmetic number, because the mean of its divisors is an integer number (188511075).

Almost surely, 2^749017189 is an apocalyptic number.

It is an amenable number.

749017189 is a deficient number, since it is larger than the sum of its proper divisors (5027111).

749017189 is a wasteful number, since it uses less digits than its factorization.

749017189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027110.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 749017189 is about 27368.1784012016. The cubic root of 749017189 is about 908.1632593585.

The spelling of 749017189 in words is "seven hundred forty-nine million, seventeen thousand, one hundred eighty-nine".