91573606 has 4 divisors (see below), whose sum is σ = 137360412. Its totient is φ = 45786802.

The previous prime is 91573591. The next prime is 91573607. The reversal of 91573606 is 60637519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60637519 = 31 ⋅1956049.

It is a super-3 number, since 3×91573606³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91573607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22893400 + ... + 22893403.

It is an arithmetic number, because the mean of its divisors is an integer number (34340103).

Almost surely, 2^91573606 is an apocalyptic number.

91573606 is a deficient number, since it is larger than the sum of its proper divisors (45786806).

91573606 is a wasteful number, since it uses less digits than its factorization.

91573606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45786805.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 91573606 is about 9569.4099086621. The cubic root of 91573606 is about 450.7372376103.

The spelling of 91573606 in words is "ninety-one million, five hundred seventy-three thousand, six hundred six".