745656749 has 2 divisors, whose sum is σ = 745656750. Its totient is φ = 745656748.

The previous prime is 745656727. The next prime is 745656761. The reversal of 745656749 is 947656547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 584188900 + 161467849 = 24170^2 + 12707^2 .

It is a cyclic number.

It is not a de Polignac number, because 745656749 - 2¹² = 745652653 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 745656749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745656049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372828374 + 372828375.

It is an arithmetic number, because the mean of its divisors is an integer number (372828375).

Almost surely, 2^745656749 is an apocalyptic number.

It is an amenable number.

745656749 is a deficient number, since it is larger than the sum of its proper divisors (1).

745656749 is an equidigital number, since it uses as much as digits as its factorization.

745656749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 53.

The square root of 745656749 is about 27306.7161885130. The cubic root of 745656749 is about 906.8030753858.

The spelling of 745656749 in words is "seven hundred forty-five million, six hundred fifty-six thousand, seven hundred forty-nine".