749436845 has 4 divisors (see below), whose sum is σ = 899324220. Its totient is φ = 599549472.

The previous prime is 749436829. The next prime is 749436851. The reversal of 749436845 is 548634947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548634947 = 7 ⋅78376421.

It can be written as a sum of positive squares in 2 ways, for example, as 461863081 + 287573764 = 21491^2 + 16958^2 .

It is a cyclic number.

It is not a de Polignac number, because 749436845 - 2⁴ = 749436829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 749436793 and 749436802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74943680 + ... + 74943689.

It is an arithmetic number, because the mean of its divisors is an integer number (224831055).

Almost surely, 2^749436845 is an apocalyptic number.

It is an amenable number.

749436845 is a deficient number, since it is larger than the sum of its proper divisors (149887375).

749436845 is a wasteful number, since it uses less digits than its factorization.

749436845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149887374.

The product of its digits is 2903040, while the sum is 50.

The square root of 749436845 is about 27375.8441878967. The cubic root of 749436845 is about 908.3328349089.

The spelling of 749436845 in words is "seven hundred forty-nine million, four hundred thirty-six thousand, eight hundred forty-five".