91152073 has 4 divisors (see below), whose sum is σ = 91233940. Its totient is φ = 91070208.

The previous prime is 91152071. The next prime is 91152119. The reversal of 91152073 is 37025119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56070144 + 35081929 = 7488^2 + 5923^2 .

It is a cyclic number.

It is not a de Polignac number, because 91152073 - 2¹ = 91152071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91152071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39240 + ... + 41497.

It is an arithmetic number, because the mean of its divisors is an integer number (22808485).

Almost surely, 2^91152073 is an apocalyptic number.

It is an amenable number.

91152073 is a deficient number, since it is larger than the sum of its proper divisors (81867).

91152073 is a wasteful number, since it uses less digits than its factorization.

91152073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81866.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 91152073 is about 9547.3594778871. The cubic root of 91152073 is about 450.0445601964.

The spelling of 91152073 in words is "ninety-one million, one hundred fifty-two thousand, seventy-three".