745664723 has 4 divisors (see below), whose sum is σ = 746037528. Its totient is φ = 745291920.

The previous prime is 745664629. The next prime is 745664743. The reversal of 745664723 is 327466547.

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

It is a cyclic number.

It is not a de Polignac number, because 745664723 - 2⁸ = 745664467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745664743) 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, 183386 + ... + 187407.

It is an arithmetic number, because the mean of its divisors is an integer number (186509382).

Almost surely, 2^745664723 is an apocalyptic number.

745664723 is a deficient number, since it is larger than the sum of its proper divisors (372805).

745664723 is a wasteful number, since it uses less digits than its factorization.

745664723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372804.

The product of its digits is 846720, while the sum is 44.

The square root of 745664723 is about 27306.8621961587. The cubic root of 745664723 is about 906.8063078034.

The spelling of 745664723 in words is "seven hundred forty-five million, six hundred sixty-four thousand, seven hundred twenty-three".