749806193 has 4 divisors (see below), whose sum is σ = 750102900. Its totient is φ = 749509488.

The previous prime is 749806163. The next prime is 749806201. The reversal of 749806193 is 391608947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 391608947 = 6173 ⋅63439.

It can be written as a sum of positive squares in 2 ways, for example, as 276656689 + 473149504 = 16633^2 + 21752^2 .

It is a cyclic number.

It is not a de Polignac number, because 749806193 - 2²⁸ = 481370737 is a prime.

It is a super-2 number, since 2×749806193² = 1124418654122306498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749806103) 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, 144530 + ... + 149627.

It is an arithmetic number, because the mean of its divisors is an integer number (187525725).

Almost surely, 2^749806193 is an apocalyptic number.

It is an amenable number.

749806193 is a deficient number, since it is larger than the sum of its proper divisors (296707).

749806193 is a wasteful number, since it uses less digits than its factorization.

749806193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296706.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 749806193 is about 27382.5892311155. The cubic root of 749806193 is about 908.4820295206.

The spelling of 749806193 in words is "seven hundred forty-nine million, eight hundred six thousand, one hundred ninety-three".