91083769 has 4 divisors (see below), whose sum is σ = 104095744. Its totient is φ = 78071796.

The previous prime is 91083767. The next prime is 91083793. The reversal of 91083769 is 96738019.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96738019 = 7 ⋅13819717.

It is a cyclic number.

It is not a de Polignac number, because 91083769 - 2¹ = 91083767 is a prime.

It is a super-2 number, since 2×91083769² = 16592505950490722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91083767) 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, 6505977 + ... + 6505990.

It is an arithmetic number, because the mean of its divisors is an integer number (26023936).

Almost surely, 2^91083769 is an apocalyptic number.

It is an amenable number.

91083769 is a deficient number, since it is larger than the sum of its proper divisors (13011975).

91083769 is a wasteful number, since it uses less digits than its factorization.

91083769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13011974.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 91083769 is about 9543.7816928092. The cubic root of 91083769 is about 449.9321198023.

The spelling of 91083769 in words is "ninety-one million, eighty-three thousand, seven hundred sixty-nine".