11709091 has 4 divisors (see below), whose sum is σ = 11734632. Its totient is φ = 11683552.

The previous prime is 11709079. The next prime is 11709101. The reversal of 11709091 is 19090711.

11709091 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19090711 = 17 ⋅1122983.

It is a cyclic number.

It is not a de Polignac number, because 11709091 - 2¹⁵ = 11676323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11706091) 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, 12070 + ... + 13003.

It is an arithmetic number, because the mean of its divisors is an integer number (2933658).

Almost surely, 2^11709091 is an apocalyptic number.

11709091 is a deficient number, since it is larger than the sum of its proper divisors (25541).

11709091 is an equidigital number, since it uses as much as digits as its factorization.

11709091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25540.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 11709091 is about 3421.8549063337. The cubic root of 11709091 is about 227.0776513761.

The spelling of 11709091 in words is "eleven million, seven hundred nine thousand, ninety-one".