748742689 has 2 divisors, whose sum is σ = 748742690. Its totient is φ = 748742688.

The previous prime is 748742653. The next prime is 748742699. The reversal of 748742689 is 986247847.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578883600 + 169859089 = 24060^2 + 13033^2 .

It is a cyclic number.

It is not a de Polignac number, because 748742689 - 2²³ = 740354081 is a prime.

It is a super-2 number, since 2×748742689² = 1121231228661901442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (748742629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374371344 + 374371345.

It is an arithmetic number, because the mean of its divisors is an integer number (374371345).

Almost surely, 2^748742689 is an apocalyptic number.

It is an amenable number.

748742689 is a deficient number, since it is larger than the sum of its proper divisors (1).

748742689 is an equidigital number, since it uses as much as digits as its factorization.

748742689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 55.

The square root of 748742689 is about 27363.1629933383. The cubic root of 748742689 is about 908.0523045064.

It can be divided in two parts, 7487 and 42689, that added together give a square (50176 = 224²).

The spelling of 748742689 in words is "seven hundred forty-eight million, seven hundred forty-two thousand, six hundred eighty-nine".