91333097 has 2 divisors, whose sum is σ = 91333098. Its totient is φ = 91333096.

The previous prime is 91333063. The next prime is 91333111. The reversal of 91333097 is 79033319.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47389456 + 43943641 = 6884^2 + 6629^2 .

It is an emirp because it is prime and its reverse (79033319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91333097 - 2¹² = 91329001 is a prime.

It is a super-2 number, since 2×91333097² = 16683469215222818, which contains 22 as substring.

It is equal to p_5289902 and since 91333097 and 5289902 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (91333007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45666548 + 45666549.

It is an arithmetic number, because the mean of its divisors is an integer number (45666549).

Almost surely, 2^91333097 is an apocalyptic number.

It is an amenable number.

91333097 is a deficient number, since it is larger than the sum of its proper divisors (1).

91333097 is an equidigital number, since it uses as much as digits as its factorization.

91333097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 35.

The square root of 91333097 is about 9556.8350932722. The cubic root of 91333097 is about 450.3422860810.

The spelling of 91333097 in words is "ninety-one million, three hundred thirty-three thousand, ninety-seven".