1002499661 has 2 divisors, whose sum is σ = 1002499662. Its totient is φ = 1002499660.

The previous prime is 1002499657. The next prime is 1002499691. The reversal of 1002499661 is 1669942001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 875035561 + 127464100 = 29581^2 + 11290^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002499661 - 2² = 1002499657 is a prime.

It is a super-2 number, since 2×1002499661² = 2010011140610229842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002499691) 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, 501249830 + 501249831.

It is an arithmetic number, because the mean of its divisors is an integer number (501249831).

Almost surely, 2^1002499661 is an apocalyptic number.

It is an amenable number.

1002499661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002499661 is an equidigital number, since it uses as much as digits as its factorization.

1002499661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1002499661 is about 31662.2750446016. The cubic root of 1002499661 is about 1000.8325270397.

The spelling of 1002499661 in words is "one billion, two million, four hundred ninety-nine thousand, six hundred sixty-one".