91393801 has 2 divisors, whose sum is σ = 91393802. Its totient is φ = 91393800.

The previous prime is 91393793. The next prime is 91393823. The reversal of 91393801 is 10839319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82537225 + 8856576 = 9085^2 + 2976^2 .

It is a cyclic number.

It is not a de Polignac number, because 91393801 - 2³ = 91393793 is a prime.

It is a super-2 number, since 2×91393801² = 16705653722455202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91393871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45696900 + 45696901.

It is an arithmetic number, because the mean of its divisors is an integer number (45696901).

Almost surely, 2^91393801 is an apocalyptic number.

It is an amenable number.

91393801 is a deficient number, since it is larger than the sum of its proper divisors (1).

91393801 is an equidigital number, since it uses as much as digits as its factorization.

91393801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 91393801 is about 9560.0105125465. The cubic root of 91393801 is about 450.4420364259.

The spelling of 91393801 in words is "ninety-one million, three hundred ninety-three thousand, eight hundred one".