11907989 has 2 divisors, whose sum is σ = 11907990. Its totient is φ = 11907988.

The previous prime is 11907983. The next prime is 11908019. The reversal of 11907989 is 98970911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11785489 + 122500 = 3433^2 + 350^2 .

It is a cyclic number.

It is not a de Polignac number, because 11907989 - 2⁸ = 11907733 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 (11907983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5953994 + 5953995.

It is an arithmetic number, because the mean of its divisors is an integer number (5953995).

Almost surely, 2^11907989 is an apocalyptic number.

It is an amenable number.

11907989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11907989 is an equidigital number, since it uses as much as digits as its factorization.

11907989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 11907989 is about 3450.7954155528. The cubic root of 11907989 is about 228.3562004318.

The spelling of 11907989 in words is "eleven million, nine hundred seven thousand, nine hundred eighty-nine".