745581973 has 2 divisors, whose sum is σ = 745581974. Its totient is φ = 745581972.

The previous prime is 745581959. The next prime is 745582037. The reversal of 745581973 is 379185547.

It is a happy number.

745581973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745453809 + 128164 = 27303^2 + 358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-745581973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745581913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372790986 + 372790987.

It is an arithmetic number, because the mean of its divisors is an integer number (372790987).

Almost surely, 2^745581973 is an apocalyptic number.

It is an amenable number.

745581973 is a deficient number, since it is larger than the sum of its proper divisors (1).

745581973 is an equidigital number, since it uses as much as digits as its factorization.

745581973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 49.

The square root of 745581973 is about 27305.3469672150. The cubic root of 745581973 is about 906.7727623436.

The spelling of 745581973 in words is "seven hundred forty-five million, five hundred eighty-one thousand, nine hundred seventy-three".