11898881 has 2 divisors, whose sum is σ = 11898882. Its totient is φ = 11898880.

The previous prime is 11898877. The next prime is 11898973. The reversal of 11898881 is 18889811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6682225 + 5216656 = 2585^2 + 2284^2 .

It is an emirp because it is prime and its reverse (18889811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11898881 - 2² = 11898877 is a prime.

It is a super-2 number, since 2×11898881² = 283166738104322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11898841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5949440 + 5949441.

It is an arithmetic number, because the mean of its divisors is an integer number (5949441).

It is a Proth number, since it is equal to 2905 ⋅ 2¹² + 1 and 2905 < 2¹².

Almost surely, 2^11898881 is an apocalyptic number.

It is an amenable number.

11898881 is a deficient number, since it is larger than the sum of its proper divisors (1).

11898881 is an equidigital number, since it uses as much as digits as its factorization.

11898881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 44.

The square root of 11898881 is about 3449.4754673718. The cubic root of 11898881 is about 228.2979650524.

The spelling of 11898881 in words is "eleven million, eight hundred ninety-eight thousand, eight hundred eighty-one".