2131209079 has 2 divisors, whose sum is σ = 2131209080. Its totient is φ = 2131209078.

The previous prime is 2131209071. The next prime is 2131209103. The reversal of 2131209079 is 9709021312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131209079 - 2³ = 2131209071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131209071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065604539 + 1065604540.

It is an arithmetic number, because the mean of its divisors is an integer number (1065604540).

Almost surely, 2^2131209079 is an apocalyptic number.

2131209079 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131209079 is an equidigital number, since it uses as much as digits as its factorization.

2131209079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 2131209079 is about 46165.0200801429. The cubic root of 2131209079 is about 1286.8917573649.

The spelling of 2131209079 in words is "two billion, one hundred thirty-one million, two hundred nine thousand, seventy-nine".