11297997787 has 2 divisors, whose sum is σ = 11297997788. Its totient is φ = 11297997786.

The previous prime is 11297997779. The next prime is 11297997829. The reversal of 11297997787 is 78779979211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11297997787 - 2³ = 11297997779 is a prime.

It is not a weakly prime, because it can be changed into another prime (11297997707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5648998893 + 5648998894.

It is an arithmetic number, because the mean of its divisors is an integer number (5648998894).

Almost surely, 2^11297997787 is an apocalyptic number.

11297997787 is a deficient number, since it is larger than the sum of its proper divisors (1).

11297997787 is an equidigital number, since it uses as much as digits as its factorization.

11297997787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28005264, while the sum is 67.

The spelling of 11297997787 in words is "eleven billion, two hundred ninety-seven million, nine hundred ninety-seven thousand, seven hundred eighty-seven".