11639897 has 2 divisors, whose sum is σ = 11639898. Its totient is φ = 11639896.

The previous prime is 11639893. The next prime is 11639963. The reversal of 11639897 is 79893611.

11639897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10601536 + 1038361 = 3256^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 11639897 - 2² = 11639893 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11639893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819948 + 5819949.

It is an arithmetic number, because the mean of its divisors is an integer number (5819949).

Almost surely, 2^11639897 is an apocalyptic number.

It is an amenable number.

11639897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11639897 is an equidigital number, since it uses as much as digits as its factorization.

11639897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 11639897 is about 3411.7293268957. The cubic root of 11639897 is about 226.6294678959.

The spelling of 11639897 in words is "eleven million, six hundred thirty-nine thousand, eight hundred ninety-seven".