1002740681 has 4 divisors (see below), whose sum is σ = 1003366272. Its totient is φ = 1002115092.

The previous prime is 1002740677. The next prime is 1002740707. The reversal of 1002740681 is 1860472001.

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 not a de Polignac number, because 1002740681 - 2² = 1002740677 is a prime.

It is a super-2 number, since 2×1002740681² = 2010977746664687522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002740611) 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 in 3 ways as a sum of consecutive naturals, for example, 310385 + ... + 313598.

It is an arithmetic number, because the mean of its divisors is an integer number (250841568).

Almost surely, 2^1002740681 is an apocalyptic number.

It is an amenable number.

1002740681 is a deficient number, since it is larger than the sum of its proper divisors (625591).

1002740681 is an equidigital number, since it uses as much as digits as its factorization.

1002740681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625590.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1002740681 is about 31666.0809226529. The cubic root of 1002740681 is about 1000.9127270093.

The spelling of 1002740681 in words is "one billion, two million, seven hundred forty thousand, six hundred eighty-one".