4279900921 has 2 divisors, whose sum is σ = 4279900922. Its totient is φ = 4279900920.

The previous prime is 4279900913. The next prime is 4279900967. The reversal of 4279900921 is 1290099724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2148786025 + 2131114896 = 46355^2 + 46164^2 .

It is a cyclic number.

It is not a de Polignac number, because 4279900921 - 2³ = 4279900913 is a prime.

It is not a weakly prime, because it can be changed into another prime (4279900321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139950460 + 2139950461.

It is an arithmetic number, because the mean of its divisors is an integer number (2139950461).

Almost surely, 2^4279900921 is an apocalyptic number.

It is an amenable number.

4279900921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4279900921 is an equidigital number, since it uses as much as digits as its factorization.

4279900921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 4279900921 is about 65420.9516974493. The cubic root of 4279900921 is about 1623.5957472987.

The spelling of 4279900921 in words is "four billion, two hundred seventy-nine million, nine hundred thousand, nine hundred twenty-one".