91669874 has 4 divisors (see below), whose sum is σ = 137504814. Its totient is φ = 45834936.

The previous prime is 91669861. The next prime is 91669909. The reversal of 91669874 is 47896619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47896619 = 47 ⋅1019077.

It can be written as a sum of positive squares in only one way, i.e., 89434849 + 2235025 = 9457^2 + 1495^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22917467 + ... + 22917470.

Almost surely, 2^91669874 is an apocalyptic number.

91669874 is a deficient number, since it is larger than the sum of its proper divisors (45834940).

91669874 is a wasteful number, since it uses less digits than its factorization.

91669874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45834939.

The product of its digits is 653184, while the sum is 50.

The square root of 91669874 is about 9574.4385736188. The cubic root of 91669874 is about 450.8951301801.

The spelling of 91669874 in words is "ninety-one million, six hundred sixty-nine thousand, eight hundred seventy-four".