2138421479 has 2 divisors, whose sum is σ = 2138421480. Its totient is φ = 2138421478.

The previous prime is 2138421427. The next prime is 2138421529. The reversal of 2138421479 is 9741248312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2138421479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2138421409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069210739 + 1069210740.

It is an arithmetic number, because the mean of its divisors is an integer number (1069210740).

Almost surely, 2^2138421479 is an apocalyptic number.

2138421479 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138421479 is an equidigital number, since it uses as much as digits as its factorization.

2138421479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 2138421479 is about 46243.0695239838. The cubic root of 2138421479 is about 1288.3418149337.

The spelling of 2138421479 in words is "two billion, one hundred thirty-eight million, four hundred twenty-one thousand, four hundred seventy-nine".