745688923 has 4 divisors (see below), whose sum is σ = 852215920. Its totient is φ = 639161928.

The previous prime is 745688899. The next prime is 745688939. The reversal of 745688923 is 329886547.

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 745688923 - 2¹³ = 745680731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745686923) 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 3 ways as a sum of consecutive naturals, for example, 53263488 + ... + 53263501.

It is an arithmetic number, because the mean of its divisors is an integer number (213053980).

Almost surely, 2^745688923 is an apocalyptic number.

745688923 is a deficient number, since it is larger than the sum of its proper divisors (106526997).

745688923 is a wasteful number, since it uses less digits than its factorization.

745688923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106526996.

The product of its digits is 2903040, while the sum is 52.

The square root of 745688923 is about 27307.3053046250. The cubic root of 745688923 is about 906.8161176078.

The spelling of 745688923 in words is "seven hundred forty-five million, six hundred eighty-eight thousand, nine hundred twenty-three".