11691451 has 2 divisors, whose sum is σ = 11691452. Its totient is φ = 11691450.

The previous prime is 11691439. The next prime is 11691467. The reversal of 11691451 is 15419611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11691451 - 2⁵ = 11691419 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11691851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5845725 + 5845726.

It is an arithmetic number, because the mean of its divisors is an integer number (5845726).

Almost surely, 2^11691451 is an apocalyptic number.

11691451 is a deficient number, since it is larger than the sum of its proper divisors (1).

11691451 is an equidigital number, since it uses as much as digits as its factorization.

11691451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 28.

The square root of 11691451 is about 3419.2763854360. The cubic root of 11691451 is about 226.9635615921.

The spelling of 11691451 in words is "eleven million, six hundred ninety-one thousand, four hundred fifty-one".