91007669 has 4 divisors (see below), whose sum is σ = 92499660. Its totient is φ = 89515680.

The previous prime is 91007639. The next prime is 91007671. The reversal of 91007669 is 96670019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96670019 = 8539 ⋅11321.

It can be written as a sum of positive squares in 2 ways, for example, as 2365444 + 88642225 = 1538^2 + 9415^2 .

It is a cyclic number.

It is not a de Polignac number, because 91007669 - 2¹² = 91003573 is a prime.

It is a super-2 number, since 2×91007669² = 16564791633627122, 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 (91007629) 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, 745904 + ... + 746025.

It is an arithmetic number, because the mean of its divisors is an integer number (23124915).

Almost surely, 2^91007669 is an apocalyptic number.

It is an amenable number.

91007669 is a deficient number, since it is larger than the sum of its proper divisors (1491991).

91007669 is a wasteful number, since it uses less digits than its factorization.

91007669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491990.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 91007669 is about 9539.7939705216. The cubic root of 91007669 is about 449.8067795986.

The spelling of 91007669 in words is "ninety-one million, seven thousand, six hundred sixty-nine".