10402868909 has 2 divisors, whose sum is σ = 10402868910. Its totient is φ = 10402868908.

The previous prime is 10402868851. The next prime is 10402868911. The reversal of 10402868909 is 90986820401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7788592009 + 2614276900 = 88253^2 + 51130^2 .

It is an emirp because it is prime and its reverse (90986820401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10402868909 - 2²⁴ = 10386091693 is a prime.

Together with 10402868911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10402868929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5201434454 + 5201434455.

It is an arithmetic number, because the mean of its divisors is an integer number (5201434455).

Almost surely, 2^10402868909 is an apocalyptic number.

It is an amenable number.

10402868909 is a deficient number, since it is larger than the sum of its proper divisors (1).

10402868909 is an equidigital number, since it uses as much as digits as its factorization.

10402868909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 10402868909 in words is "ten billion, four hundred two million, eight hundred sixty-eight thousand, nine hundred nine".