2138523407 has 2 divisors, whose sum is σ = 2138523408. Its totient is φ = 2138523406.

The previous prime is 2138523367. The next prime is 2138523427. The reversal of 2138523407 is 7043258312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2138523407 - 2²² = 2134329103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2138523427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069261703 + 1069261704.

It is an arithmetic number, because the mean of its divisors is an integer number (1069261704).

Almost surely, 2^2138523407 is an apocalyptic number.

2138523407 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138523407 is an equidigital number, since it uses as much as digits as its factorization.

2138523407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 2138523407 is about 46244.1716003217. The cubic root of 2138523407 is about 1288.3622842408.

The spelling of 2138523407 in words is "two billion, one hundred thirty-eight million, five hundred twenty-three thousand, four hundred seven".