2279437921 has 16 divisors (see below), whose sum is σ = 2349291024. Its totient is φ = 2210955264.

The previous prime is 2279437907. The next prime is 2279437949. The reversal of 2279437921 is 1297349722.

It can be written as a sum of positive squares in 8 ways, for example, as 7485696 + 2271952225 = 2736^2 + 47665^2 .

It is a cyclic number.

It is not a de Polignac number, because 2279437921 - 2¹³ = 2279429729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2279437421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129105 + ... + 1131121.

It is an arithmetic number, because the mean of its divisors is an integer number (146830689).

Almost surely, 2^2279437921 is an apocalyptic number.

It is an amenable number.

2279437921 is a deficient number, since it is larger than the sum of its proper divisors (69853103).

2279437921 is a wasteful number, since it uses less digits than its factorization.

2279437921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340.

The product of its digits is 381024, while the sum is 46.

The square root of 2279437921 is about 47743.4594578147. The cubic root of 2279437921 is about 1316.0607075973.

The spelling of 2279437921 in words is "two billion, two hundred seventy-nine million, four hundred thirty-seven thousand, nine hundred twenty-one".