745409791 has 4 divisors (see below), whose sum is σ = 851896912. Its totient is φ = 638922672.

The previous prime is 745409723. The next prime is 745409837. The reversal of 745409791 is 197904547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197904547 = 1789 ⋅110623.

It is a cyclic number.

It is not a de Polignac number, because 745409791 - 2¹¹ = 745407743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745409711) 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, 53243550 + ... + 53243563.

It is an arithmetic number, because the mean of its divisors is an integer number (212974228).

Almost surely, 2^745409791 is an apocalyptic number.

745409791 is a deficient number, since it is larger than the sum of its proper divisors (106487121).

745409791 is a wasteful number, since it uses less digits than its factorization.

745409791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106487120.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 745409791 is about 27302.1938862063. The cubic root of 745409791 is about 906.7029546973.

The spelling of 745409791 in words is "seven hundred forty-five million, four hundred nine thousand, seven hundred ninety-one".