745091775 has 18 divisors (see below), whose sum is σ = 1334542560. Its totient is φ = 397382160.

The previous prime is 745091773. The next prime is 745091777. The reversal of 745091775 is 577190547.

745091775 is a `hidden beast` number, since 74 + 509 + 1 + 7 + 75 = 666.

It is an interprime number because it is at equal distance from previous prime (745091773) and next prime (745091777).

It is not a de Polignac number, because 745091775 - 2¹ = 745091773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 745091775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745091771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1655535 + ... + 1655984.

Almost surely, 2^745091775 is an apocalyptic number.

745091775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

745091775 is a deficient number, since it is larger than the sum of its proper divisors (589450785).

745091775 is a wasteful number, since it uses less digits than its factorization.

745091775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311535 (or 3311527 counting only the distinct ones).

The product of its (nonzero) digits is 308700, while the sum is 45.

The square root of 745091775 is about 27296.3692640615. The cubic root of 745091775 is about 906.5739933904.

It can be divided in two parts, 7450 and 91775, that added together give a square (99225 = 315²).

The spelling of 745091775 in words is "seven hundred forty-five million, ninety-one thousand, seven hundred seventy-five".