11491787 has 2 divisors, whose sum is σ = 11491788. Its totient is φ = 11491786.

The previous prime is 11491763. The next prime is 11491807. The reversal of 11491787 is 78719411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11491787 - 2⁸ = 11491531 is a prime.

It is a super-2 number, since 2×11491787² = 264122336906738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11491787.

It is not a weakly prime, because it can be changed into another prime (11491717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5745893 + 5745894.

It is an arithmetic number, because the mean of its divisors is an integer number (5745894).

Almost surely, 2^11491787 is an apocalyptic number.

11491787 is a deficient number, since it is larger than the sum of its proper divisors (1).

11491787 is an equidigital number, since it uses as much as digits as its factorization.

11491787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 38.

The square root of 11491787 is about 3389.9538344939. The cubic root of 11491787 is about 225.6641250383.

The spelling of 11491787 in words is "eleven million, four hundred ninety-one thousand, seven hundred eighty-seven".