91010669 has 4 divisors (see below), whose sum is σ = 91861344. Its totient is φ = 90159996.

The previous prime is 91010657. The next prime is 91010677. The reversal of 91010669 is 96601019.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91010669 is a prime.

It is a super-2 number, since 2×91010669² = 16565883743655122, 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 (91010069) 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, 425177 + ... + 425390.

It is an arithmetic number, because the mean of its divisors is an integer number (22965336).

Almost surely, 2^91010669 is an apocalyptic number.

It is an amenable number.

91010669 is a deficient number, since it is larger than the sum of its proper divisors (850675).

91010669 is a wasteful number, since it uses less digits than its factorization.

91010669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850674.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 91010669 is about 9539.9512053259. The cubic root of 91010669 is about 449.8117220594.

The spelling of 91010669 in words is "ninety-one million, ten thousand, six hundred sixty-nine".