11388397487 has 2 divisors, whose sum is σ = 11388397488. Its totient is φ = 11388397486.

The previous prime is 11388397459. The next prime is 11388397523. The reversal of 11388397487 is 78479388311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11388397487 - 2²⁶ = 11321288623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11388397417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5694198743 + 5694198744.

It is an arithmetic number, because the mean of its divisors is an integer number (5694198744).

Almost surely, 2^11388397487 is an apocalyptic number.

11388397487 is a deficient number, since it is larger than the sum of its proper divisors (1).

11388397487 is an equidigital number, since it uses as much as digits as its factorization.

11388397487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 59.

The spelling of 11388397487 in words is "eleven billion, three hundred eighty-eight million, three hundred ninety-seven thousand, four hundred eighty-seven".