11347981 has 2 divisors, whose sum is σ = 11347982. Its totient is φ = 11347980.

The previous prime is 11347969. The next prime is 11348003. The reversal of 11347981 is 18974311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 259081 = 3330^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 11347981 - 2⁵ = 11347949 is a prime.

It is a super-2 number, since 2×11347981² = 257553345552722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11347951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5673990 + 5673991.

It is an arithmetic number, because the mean of its divisors is an integer number (5673991).

Almost surely, 2^11347981 is an apocalyptic number.

It is an amenable number.

11347981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11347981 is an equidigital number, since it uses as much as digits as its factorization.

11347981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The square root of 11347981 is about 3368.6764463213. The cubic root of 11347981 is about 224.7188653330.

The spelling of 11347981 in words is "eleven million, three hundred forty-seven thousand, nine hundred eighty-one".