11974909 has 2 divisors, whose sum is σ = 11974910. Its totient is φ = 11974908.

The previous prime is 11974903. The next prime is 11974913. The reversal of 11974909 is 90947911.

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., 8982009 + 2992900 = 2997^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 11974909 - 2³ = 11974901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11974901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5987454 + 5987455.

It is an arithmetic number, because the mean of its divisors is an integer number (5987455).

Almost surely, 2^11974909 is an apocalyptic number.

It is an amenable number.

11974909 is a deficient number, since it is larger than the sum of its proper divisors (1).

11974909 is an equidigital number, since it uses as much as digits as its factorization.

11974909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 11974909 is about 3460.4781461526. The cubic root of 11974909 is about 228.7831703618.

The spelling of 11974909 in words is "eleven million, nine hundred seventy-four thousand, nine hundred nine".