745628969 has 2 divisors, whose sum is σ = 745628970. Its totient is φ = 745628968.

The previous prime is 745628941. The next prime is 745629023. The reversal of 745628969 is 969826547.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406627225 + 339001744 = 20165^2 + 18412^2 .

It is a cyclic number.

It is not a de Polignac number, because 745628969 - 2⁸ = 745628713 is a prime.

It is a super-2 number, since 2×745628969² = 1111925118824005922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (745628909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372814484 + 372814485.

It is an arithmetic number, because the mean of its divisors is an integer number (372814485).

Almost surely, 2^745628969 is an apocalyptic number.

It is an amenable number.

745628969 is a deficient number, since it is larger than the sum of its proper divisors (1).

745628969 is an equidigital number, since it uses as much as digits as its factorization.

745628969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The square root of 745628969 is about 27306.2075177056. The cubic root of 745628969 is about 906.7918140370.

The spelling of 745628969 in words is "seven hundred forty-five million, six hundred twenty-eight thousand, nine hundred sixty-nine".