91552729 has 2 divisors, whose sum is σ = 91552730. Its totient is φ = 91552728.

The previous prime is 91552709. The next prime is 91552733. The reversal of 91552729 is 92725519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91489225 + 63504 = 9565^2 + 252^2 .

It is a cyclic number.

It is not a de Polignac number, because 91552729 - 2¹¹ = 91550681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91552691 and 91552700.

It is not a weakly prime, because it can be changed into another prime (91552709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45776364 + 45776365.

It is an arithmetic number, because the mean of its divisors is an integer number (45776365).

Almost surely, 2^91552729 is an apocalyptic number.

It is an amenable number.

91552729 is a deficient number, since it is larger than the sum of its proper divisors (1).

91552729 is an equidigital number, since it uses as much as digits as its factorization.

91552729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 40.

The square root of 91552729 is about 9568.3190268720. The cubic root of 91552729 is about 450.7029819009.

The spelling of 91552729 in words is "ninety-one million, five hundred fifty-two thousand, seven hundred twenty-nine".