11965901 has 2 divisors, whose sum is σ = 11965902. Its totient is φ = 11965900.

The previous prime is 11965883. The next prime is 11965903. The reversal of 11965901 is 10956911.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8352100 + 3613801 = 2890^2 + 1901^2 .

It is a cyclic number.

It is not a de Polignac number, because 11965901 - 2¹⁰ = 11964877 is a prime.

Together with 11965903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11965903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5982950 + 5982951.

It is an arithmetic number, because the mean of its divisors is an integer number (5982951).

Almost surely, 2^11965901 is an apocalyptic number.

It is an amenable number.

11965901 is a deficient number, since it is larger than the sum of its proper divisors (1).

11965901 is an equidigital number, since it uses as much as digits as its factorization.

11965901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 11965901 is about 3459.1763470514. The cubic root of 11965901 is about 228.7257893893.

The spelling of 11965901 in words is "eleven million, nine hundred sixty-five thousand, nine hundred one".