11667391 has 2 divisors, whose sum is σ = 11667392. Its totient is φ = 11667390.

The previous prime is 11667373. The next prime is 11667407. The reversal of 11667391 is 19376611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11667391 - 2¹³ = 11659199 is a prime.

It is a super-2 number, since 2×11667391² = 272256025493762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11667301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833695 + 5833696.

It is an arithmetic number, because the mean of its divisors is an integer number (5833696).

Almost surely, 2^11667391 is an apocalyptic number.

11667391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11667391 is an equidigital number, since it uses as much as digits as its factorization.

11667391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 34.

The square root of 11667391 is about 3415.7562852171. The cubic root of 11667391 is about 226.8077641782.

The spelling of 11667391 in words is "eleven million, six hundred sixty-seven thousand, three hundred ninety-one".