2308879821 has 4 divisors (see below), whose sum is σ = 3078506432. Its totient is φ = 1539253212.

The previous prime is 2308879819. The next prime is 2308879823. The reversal of 2308879821 is 1289788032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2308879819) and next prime (2308879823).

It is not a de Polignac number, because 2308879821 - 2¹ = 2308879819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2308879823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384813301 + ... + 384813306.

It is an arithmetic number, because the mean of its divisors is an integer number (769626608).

Almost surely, 2^2308879821 is an apocalyptic number.

It is an amenable number.

2308879821 is a deficient number, since it is larger than the sum of its proper divisors (769626611).

2308879821 is an equidigital number, since it uses as much as digits as its factorization.

2308879821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769626610.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 2308879821 is about 48050.8045822336. The cubic root of 2308879821 is about 1321.7026965352.

The spelling of 2308879821 in words is "two billion, three hundred eight million, eight hundred seventy-nine thousand, eight hundred twenty-one".