2102440399 has 2 divisors, whose sum is σ = 2102440400. Its totient is φ = 2102440398.

The previous prime is 2102440393. The next prime is 2102440441. The reversal of 2102440399 is 9930442012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2102440399 - 2³ = 2102440391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102440391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051220199 + 1051220200.

It is an arithmetic number, because the mean of its divisors is an integer number (1051220200).

Almost surely, 2^2102440399 is an apocalyptic number.

2102440399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102440399 is an equidigital number, since it uses as much as digits as its factorization.

2102440399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2102440399 is about 45852.3761543500. The cubic root of 2102440399 is about 1281.0750244051.

The spelling of 2102440399 in words is "two billion, one hundred two million, four hundred forty thousand, three hundred ninety-nine".