91669853 has 4 divisors (see below), whose sum is σ = 100003488. Its totient is φ = 83336220.

The previous prime is 91669843. The next prime is 91669861. The reversal of 91669853 is 35896619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 91669853 - 2⁸ = 91669597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91669798 and 91669807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91669843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4166801 + ... + 4166822.

It is an arithmetic number, because the mean of its divisors is an integer number (25000872).

Almost surely, 2^91669853 is an apocalyptic number.

It is an amenable number.

91669853 is a deficient number, since it is larger than the sum of its proper divisors (8333635).

91669853 is a wasteful number, since it uses less digits than its factorization.

91669853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8333634.

The product of its digits is 349920, while the sum is 47.

The square root of 91669853 is about 9574.4374769487. The cubic root of 91669853 is about 450.8950957493.

The spelling of 91669853 in words is "ninety-one million, six hundred sixty-nine thousand, eight hundred fifty-three".