7721272423 has 2 divisors, whose sum is σ = 7721272424. Its totient is φ = 7721272422.

The previous prime is 7721272411. The next prime is 7721272499. The reversal of 7721272423 is 3242721277.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7721272423 - 2⁹ = 7721271911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7721212423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860636211 + 3860636212.

It is an arithmetic number, because the mean of its divisors is an integer number (3860636212).

Almost surely, 2^7721272423 is an apocalyptic number.

7721272423 is a deficient number, since it is larger than the sum of its proper divisors (1).

7721272423 is an equidigital number, since it uses as much as digits as its factorization.

7721272423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856, while the sum is 37.

The square root of 7721272423 is about 87870.7711528697. The cubic root of 7721272423 is about 1976.4976023906.

The spelling of 7721272423 in words is "seven billion, seven hundred twenty-one million, two hundred seventy-two thousand, four hundred twenty-three".