5023771721 has 2 divisors, whose sum is σ = 5023771722. Its totient is φ = 5023771720.

The previous prime is 5023771699. The next prime is 5023771729. The reversal of 5023771721 is 1271773205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3628375696 + 1395396025 = 60236^2 + 37355^2 .

It is a cyclic number.

It is not a de Polignac number, because 5023771721 - 2²² = 5019577417 is a prime.

It is not a weakly prime, because it can be changed into another prime (5023771729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2511885860 + 2511885861.

It is an arithmetic number, because the mean of its divisors is an integer number (2511885861).

Almost surely, 2^5023771721 is an apocalyptic number.

It is an amenable number.

5023771721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5023771721 is an equidigital number, since it uses as much as digits as its factorization.

5023771721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 5023771721 is about 70878.5702522279. The cubic root of 5023771721 is about 1712.6816013996.

The spelling of 5023771721 in words is "five billion, twenty-three million, seven hundred seventy-one thousand, seven hundred twenty-one".