91385530 has 8 divisors (see below), whose sum is σ = 164493972. Its totient is φ = 36554208.

The previous prime is 91385527. The next prime is 91385533. The reversal of 91385530 is 3558319.

It is an interprime number because it is at equal distance from previous prime (91385527) and next prime (91385533).

It can be written as a sum of positive squares in 2 ways, for example, as 90079081 + 1306449 = 9491^2 + 1143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (91385533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4569267 + ... + 4569286.

Almost surely, 2^91385530 is an apocalyptic number.

91385530 is a deficient number, since it is larger than the sum of its proper divisors (73108442).

91385530 is a wasteful number, since it uses less digits than its factorization.

91385530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138560.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 91385530 is about 9559.5779195527. The cubic root of 91385530 is about 450.4284479096.

The spelling of 91385530 in words is "ninety-one million, three hundred eighty-five thousand, five hundred thirty".