91874159 has 12 divisors (see below), whose sum is σ = 100256184. Its totient is φ = 83687424.

The previous prime is 91874119. The next prime is 91874183. The reversal of 91874159 is 95147819.

It is not a de Polignac number, because 91874159 - 2¹⁶ = 91808623 is a prime.

It is a super-2 number, since 2×91874159² = 16881722183914562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91874119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 357359 + ... + 357615.

It is an arithmetic number, because the mean of its divisors is an integer number (8354682).

Almost surely, 2^91874159 is an apocalyptic number.

91874159 is a deficient number, since it is larger than the sum of its proper divisors (8382025).

91874159 is a wasteful number, since it uses less digits than its factorization.

91874159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 377 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The square root of 91874159 is about 9585.1008862714. The cubic root of 91874159 is about 451.2298194641.

The spelling of 91874159 in words is "ninety-one million, eight hundred seventy-four thousand, one hundred fifty-nine".