11971607 has 2 divisors, whose sum is σ = 11971608. Its totient is φ = 11971606.

The previous prime is 11971567. The next prime is 11971637. The reversal of 11971607 is 70617911.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11971607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11971637) 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, 5985803 + 5985804.

It is an arithmetic number, because the mean of its divisors is an integer number (5985804).

Almost surely, 2^11971607 is an apocalyptic number.

11971607 is a deficient number, since it is larger than the sum of its proper divisors (1).

11971607 is an equidigital number, since it uses as much as digits as its factorization.

11971607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 32.

The square root of 11971607 is about 3460.0010115605. The cubic root of 11971607 is about 228.7621399591.

The spelling of 11971607 in words is "eleven million, nine hundred seventy-one thousand, six hundred seven".