53722729 has 2 divisors, whose sum is σ = 53722730. Its totient is φ = 53722728.

The previous prime is 53722723. The next prime is 53722763. The reversal of 53722729 is 92722735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36723600 + 16999129 = 6060^2 + 4123^2 .

It is a cyclic number.

It is not a de Polignac number, because 53722729 - 2⁹ = 53722217 is a prime.

It is a super-2 number, since 2×53722729² = 5772263222414882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53722723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26861364 + 26861365.

It is an arithmetic number, because the mean of its divisors is an integer number (26861365).

Almost surely, 2^53722729 is an apocalyptic number.

It is an amenable number.

53722729 is a deficient number, since it is larger than the sum of its proper divisors (1).

53722729 is an equidigital number, since it uses as much as digits as its factorization.

53722729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 37.

The square root of 53722729 is about 7329.5790465756. The cubic root of 53722729 is about 377.3282794262.

The spelling of 53722729 in words is "fifty-three million, seven hundred twenty-two thousand, seven hundred twenty-nine".