748742681 has 4 divisors (see below), whose sum is σ = 748842000. Its totient is φ = 748643364.

The previous prime is 748742653. The next prime is 748742689. The reversal of 748742681 is 186247847.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-748742681 is a prime.

It is a super-2 number, since 2×748742681² = 1121231204702135522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (748742689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37331 + ... + 53768.

It is an arithmetic number, because the mean of its divisors is an integer number (187210500).

Almost surely, 2^748742681 is an apocalyptic number.

It is an amenable number.

748742681 is a deficient number, since it is larger than the sum of its proper divisors (99319).

748742681 is an equidigital number, since it uses as much as digits as its factorization.

748742681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99318.

The product of its digits is 602112, while the sum is 47.

The square root of 748742681 is about 27363.1628471564. The cubic root of 748742681 is about 908.0523012723.

The spelling of 748742681 in words is "seven hundred forty-eight million, seven hundred forty-two thousand, six hundred eighty-one".