27421772723 has 2 divisors, whose sum is σ = 27421772724. Its totient is φ = 27421772722.

The previous prime is 27421772717. The next prime is 27421772831. The reversal of 27421772723 is 32727712472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27421772723 - 2⁶ = 27421772659 is a prime.

It is not a weakly prime, because it can be changed into another prime (27421775723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13710886361 + 13710886362.

It is an arithmetic number, because the mean of its divisors is an integer number (13710886362).

Almost surely, 2^27421772723 is an apocalyptic number.

27421772723 is a deficient number, since it is larger than the sum of its proper divisors (1).

27421772723 is an equidigital number, since it uses as much as digits as its factorization.

27421772723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460992, while the sum is 44.

The spelling of 27421772723 in words is "twenty-seven billion, four hundred twenty-one million, seven hundred seventy-two thousand, seven hundred twenty-three".