745449689 has 2 divisors, whose sum is σ = 745449690. Its totient is φ = 745449688.

The previous prime is 745449641. The next prime is 745449701. The reversal of 745449689 is 986944547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485982025 + 259467664 = 22045^2 + 16108^2 .

It is a cyclic number.

It is not a de Polignac number, because 745449689 - 2¹² = 745445593 is a prime.

It is not a weakly prime, because it can be changed into another prime (745443689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372724844 + 372724845.

It is an arithmetic number, because the mean of its divisors is an integer number (372724845).

Almost surely, 2^745449689 is an apocalyptic number.

It is an amenable number.

745449689 is a deficient number, since it is larger than the sum of its proper divisors (1).

745449689 is an equidigital number, since it uses as much as digits as its factorization.

745449689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 56.

The square root of 745449689 is about 27302.9245503115. The cubic root of 745449689 is about 906.7191314766.

The spelling of 745449689 in words is "seven hundred forty-five million, four hundred forty-nine thousand, six hundred eighty-nine".