11649901 has 2 divisors, whose sum is σ = 11649902. Its totient is φ = 11649900.

The previous prime is 11649889. The next prime is 11649923. The reversal of 11649901 is 10994611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 561001 = 3330^2 + 749^2 .

It is an emirp because it is prime and its reverse (10994611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11649901 - 2⁹ = 11649389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11649941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5824950 + 5824951.

It is an arithmetic number, because the mean of its divisors is an integer number (5824951).

Almost surely, 2^11649901 is an apocalyptic number.

It is an amenable number.

11649901 is a deficient number, since it is larger than the sum of its proper divisors (1).

11649901 is an equidigital number, since it uses as much as digits as its factorization.

11649901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 11649901 is about 3413.1951306657. The cubic root of 11649901 is about 226.6943754573.

The spelling of 11649901 in words is "eleven million, six hundred forty-nine thousand, nine hundred one".