1002388661 has 8 divisors (see below), whose sum is σ = 1019348448. Its totient is φ = 985446000.

The previous prime is 1002388633. The next prime is 1002388669. The reversal of 1002388661 is 1668832001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002388661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002388669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178466 + ... + 183996.

It is an arithmetic number, because the mean of its divisors is an integer number (127418556).

Almost surely, 2^1002388661 is an apocalyptic number.

It is an amenable number.

1002388661 is a deficient number, since it is larger than the sum of its proper divisors (16959787).

1002388661 is an equidigital number, since it uses as much as digits as its factorization.

1002388661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8563.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1002388661 is about 31660.5221214054. The cubic root of 1002388661 is about 1000.7955872065.

The spelling of 1002388661 in words is "one billion, two million, three hundred eighty-eight thousand, six hundred sixty-one".