91559559 has 16 divisors (see below), whose sum is σ = 150252032. Its totient is φ = 48295008.

The previous prime is 91559549. The next prime is 91559609. The reversal of 91559559 is 95595519.

It is not a de Polignac number, because 91559559 - 2⁴ = 91559543 is a prime.

It is a super-3 number, since 3×91559559³ (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 (91559539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167419 + ... + 167964.

It is an arithmetic number, because the mean of its divisors is an integer number (9390752).

Almost surely, 2^91559559 is an apocalyptic number.

91559559 is a deficient number, since it is larger than the sum of its proper divisors (58692473).

91559559 is a wasteful number, since it uses less digits than its factorization.

91559559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335406.

The product of its digits is 455625, while the sum is 48.

The square root of 91559559 is about 9568.6759272117. The cubic root of 91559559 is about 450.7141893761.

The spelling of 91559559 in words is "ninety-one million, five hundred fifty-nine thousand, five hundred fifty-nine".