4320279991 has 2 divisors, whose sum is σ = 4320279992. Its totient is φ = 4320279990.

The previous prime is 4320279979. The next prime is 4320280007. The reversal of 4320279991 is 1999720234.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4320279991 - 2¹¹ = 4320277943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4320279191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2160139995 + 2160139996.

It is an arithmetic number, because the mean of its divisors is an integer number (2160139996).

Almost surely, 2^4320279991 is an apocalyptic number.

4320279991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4320279991 is an equidigital number, since it uses as much as digits as its factorization.

4320279991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 4320279991 is about 65728.8368298116. The cubic root of 4320279991 is about 1628.6857549608.

The spelling of 4320279991 in words is "four billion, three hundred twenty million, two hundred seventy-nine thousand, nine hundred ninety-one".