11891461 has 2 divisors, whose sum is σ = 11891462. Its totient is φ = 11891460.

The previous prime is 11891431. The next prime is 11891471. The reversal of 11891461 is 16419811.

11891461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8673025 + 3218436 = 2945^2 + 1794^2 .

It is an emirp because it is prime and its reverse (16419811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11891461 - 2¹³ = 11883269 is a prime.

It is equal to p₇₈₁₃₈₄ and since 11891461 and 781384 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11891431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945730 + 5945731.

It is an arithmetic number, because the mean of its divisors is an integer number (5945731).

Almost surely, 2^11891461 is an apocalyptic number.

It is an amenable number.

11891461 is a deficient number, since it is larger than the sum of its proper divisors (1).

11891461 is an equidigital number, since it uses as much as digits as its factorization.

11891461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 31.

The square root of 11891461 is about 3448.3997738081. The cubic root of 11891461 is about 228.2505005573.

The spelling of 11891461 in words is "eleven million, eight hundred ninety-one thousand, four hundred sixty-one".