748735781 has 2 divisors, whose sum is σ = 748735782. Its totient is φ = 748735780.

The previous prime is 748735759. The next prime is 748735789. The reversal of 748735781 is 187537847.

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., 748514881 + 220900 = 27359^2 + 470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-748735781 is a prime.

It is a super-2 number, since 2×748735781² = 1121210539499359922, 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 (748735789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374367890 + 374367891.

It is an arithmetic number, because the mean of its divisors is an integer number (374367891).

Almost surely, 2^748735781 is an apocalyptic number.

It is an amenable number.

748735781 is a deficient number, since it is larger than the sum of its proper divisors (1).

748735781 is an equidigital number, since it uses as much as digits as its factorization.

748735781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1317120, while the sum is 50.

The square root of 748735781 is about 27363.0367649499. The cubic root of 748735781 is about 908.0495118939.

The spelling of 748735781 in words is "seven hundred forty-eight million, seven hundred thirty-five thousand, seven hundred eighty-one".