2642947369 has 2 divisors, whose sum is σ = 2642947370. Its totient is φ = 2642947368.

The previous prime is 2642947331. The next prime is 2642947397. The reversal of 2642947369 is 9637492462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2642474025 + 473344 = 51405^2 + 688^2 .

It is a cyclic number.

It is not a de Polignac number, because 2642947369 - 2⁹ = 2642946857 is a prime.

It is a super-2 number, since 2×2642947369² = 13970341590608044322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2642947969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321473684 + 1321473685.

It is an arithmetic number, because the mean of its divisors is an integer number (1321473685).

Almost surely, 2^2642947369 is an apocalyptic number.

It is an amenable number.

2642947369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2642947369 is an equidigital number, since it uses as much as digits as its factorization.

2642947369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 52.

The square root of 2642947369 is about 51409.6038595903. The cubic root of 2642947369 is about 1382.5987872210.

The spelling of 2642947369 in words is "two billion, six hundred forty-two million, nine hundred forty-seven thousand, three hundred sixty-nine".