91338469 has 2 divisors, whose sum is σ = 91338470. Its totient is φ = 91338468.

The previous prime is 91338427. The next prime is 91338473. The reversal of 91338469 is 96483319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89529444 + 1809025 = 9462^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 91338469 - 2¹³ = 91330277 is a prime.

It is a super-2 number, since 2×91338469² = 16685431838527922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91338409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45669234 + 45669235.

It is an arithmetic number, because the mean of its divisors is an integer number (45669235).

Almost surely, 2^91338469 is an apocalyptic number.

It is an amenable number.

91338469 is a deficient number, since it is larger than the sum of its proper divisors (1).

91338469 is an equidigital number, since it uses as much as digits as its factorization.

91338469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 91338469 is about 9557.1161445281. The cubic root of 91338469 is about 450.3511152693.

The spelling of 91338469 in words is "ninety-one million, three hundred thirty-eight thousand, four hundred sixty-nine".