748139489 has 2 divisors, whose sum is σ = 748139490. Its totient is φ = 748139488.

The previous prime is 748139443. The next prime is 748139503. The reversal of 748139489 is 984931847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472845025 + 275294464 = 21745^2 + 16592^2 .

It is a cyclic number.

It is not a de Polignac number, because 748139489 - 2⁸ = 748139233 is a prime.

It is a super-2 number, since 2×748139489² = 1119425390002362242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 748139489.

It is not a weakly prime, because it can be changed into another prime (748130489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374069744 + 374069745.

It is an arithmetic number, because the mean of its divisors is an integer number (374069745).

Almost surely, 2^748139489 is an apocalyptic number.

It is an amenable number.

748139489 is a deficient number, since it is larger than the sum of its proper divisors (1).

748139489 is an equidigital number, since it uses as much as digits as its factorization.

748139489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The square root of 748139489 is about 27352.1386549571. The cubic root of 748139489 is about 907.8083914715.

The spelling of 748139489 in words is "seven hundred forty-eight million, one hundred thirty-nine thousand, four hundred eighty-nine".