11891413 has 2 divisors, whose sum is σ = 11891414. Its totient is φ = 11891412.

The previous prime is 11891389. The next prime is 11891431. The reversal of 11891413 is 31419811.

Together with next prime (11891431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11881809 + 9604 = 3447^2 + 98^2 .

It is an emirp because it is prime and its reverse (31419811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11891413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11891513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945706 + 5945707.

It is an arithmetic number, because the mean of its divisors is an integer number (5945707).

Almost surely, 2^11891413 is an apocalyptic number.

It is an amenable number.

11891413 is a deficient number, since it is larger than the sum of its proper divisors (1).

11891413 is an equidigital number, since it uses as much as digits as its factorization.

11891413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 28.

The square root of 11891413 is about 3448.3928140512. The cubic root of 11891413 is about 228.2501934451.

The spelling of 11891413 in words is "eleven million, eight hundred ninety-one thousand, four hundred thirteen".