748776989 has 2 divisors, whose sum is σ = 748776990. Its totient is φ = 748776988.

The previous prime is 748776943. The next prime is 748777021. The reversal of 748776989 is 989677847.

748776989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 733488889 + 15288100 = 27083^2 + 3910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-748776989 is a prime.

It is a super-2 number, since 2×748776989² = 1121333958511812242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (748776929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374388494 + 374388495.

It is an arithmetic number, because the mean of its divisors is an integer number (374388495).

Almost surely, 2^748776989 is an apocalyptic number.

It is an amenable number.

748776989 is a deficient number, since it is larger than the sum of its proper divisors (1).

748776989 is an equidigital number, since it uses as much as digits as its factorization.

748776989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42674688, while the sum is 65.

The square root of 748776989 is about 27363.7897411890. The cubic root of 748776989 is about 908.0661702927.

The spelling of 748776989 in words is "seven hundred forty-eight million, seven hundred seventy-six thousand, nine hundred eighty-nine".