745758749 has 2 divisors, whose sum is σ = 745758750. Its totient is φ = 745758748.

The previous prime is 745758731. The next prime is 745758757. The reversal of 745758749 is 947857547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 471193849 + 274564900 = 21707^2 + 16570^2 .

It is a cyclic number.

It is not a de Polignac number, because 745758749 - 2¹⁶ = 745693213 is a prime.

It is a super-2 number, since 2×745758749² = 1112312223420090002, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 745758694 and 745758703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745758719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372879374 + 372879375.

It is an arithmetic number, because the mean of its divisors is an integer number (372879375).

Almost surely, 2^745758749 is an apocalyptic number.

It is an amenable number.

745758749 is a deficient number, since it is larger than the sum of its proper divisors (1).

745758749 is an equidigital number, since it uses as much as digits as its factorization.

745758749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9878400, while the sum is 56.

The square root of 745758749 is about 27308.5837970408. The cubic root of 745758749 is about 906.8444213521.

The spelling of 745758749 in words is "seven hundred forty-five million, seven hundred fifty-eight thousand, seven hundred forty-nine".