11971769 has 2 divisors, whose sum is σ = 11971770. Its totient is φ = 11971768.

The previous prime is 11971763. The next prime is 11971777. The reversal of 11971769 is 96717911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11971600 + 169 = 3460^2 + 13^2 .

It is a cyclic number.

It is not a de Polignac number, because 11971769 - 2¹⁶ = 11906233 is a prime.

It is a super-2 number, since 2×11971769² = 286646505978722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11971763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5985884 + 5985885.

It is an arithmetic number, because the mean of its divisors is an integer number (5985885).

Almost surely, 2^11971769 is an apocalyptic number.

It is an amenable number.

11971769 is a deficient number, since it is larger than the sum of its proper divisors (1).

11971769 is an equidigital number, since it uses as much as digits as its factorization.

11971769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 41.

The square root of 11971769 is about 3460.0244218791. The cubic root of 11971769 is about 228.7631718256.

The spelling of 11971769 in words is "eleven million, nine hundred seventy-one thousand, seven hundred sixty-nine".