2642390969 has 2 divisors, whose sum is σ = 2642390970. Its totient is φ = 2642390968.

The previous prime is 2642390953. The next prime is 2642390981. The reversal of 2642390969 is 9690932462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1766941225 + 875449744 = 42035^2 + 29588^2 .

It is a cyclic number.

It is not a de Polignac number, because 2642390969 - 2⁴ = 2642390953 is a prime.

It is a super-2 number, since 2×2642390969² = 13964460066105517922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2642390929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321195484 + 1321195485.

It is an arithmetic number, because the mean of its divisors is an integer number (1321195485).

Almost surely, 2^2642390969 is an apocalyptic number.

It is an amenable number.

2642390969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2642390969 is an equidigital number, since it uses as much as digits as its factorization.

2642390969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The square root of 2642390969 is about 51404.1921344942. The cubic root of 2642390969 is about 1382.5017576744.

The spelling of 2642390969 in words is "two billion, six hundred forty-two million, three hundred ninety thousand, nine hundred sixty-nine".