91121594 has 8 divisors (see below), whose sum is σ = 138035988. Its totient is φ = 45109600.

The previous prime is 91121573. The next prime is 91121599. The reversal of 91121594 is 49512119.

It can be written as a sum of positive squares in 2 ways, for example, as 67453369 + 23668225 = 8213^2 + 4865^2 .

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

It is a super-3 number, since 3×91121594³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91121594.

It is not an unprimeable number, because it can be changed into a prime (91121599) 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, 225347 + ... + 225750.

Almost surely, 2^91121594 is an apocalyptic number.

91121594 is a deficient number, since it is larger than the sum of its proper divisors (46914394).

91121594 is a wasteful number, since it uses less digits than its factorization.

91121594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451200.

The product of its digits is 3240, while the sum is 32.

The square root of 91121594 is about 9545.7631439294. The cubic root of 91121594 is about 449.9943933458.

The spelling of 91121594 in words is "ninety-one million, one hundred twenty-one thousand, five hundred ninety-four".