111487399 has 2 divisors, whose sum is σ = 111487400. Its totient is φ = 111487398.

The previous prime is 111487393. The next prime is 111487429. The reversal of 111487399 is 993784111.

It is a weak prime.

It is an emirp because it is prime and its reverse (993784111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111487399 - 2⁵ = 111487367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111487393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55743699 + 55743700.

It is an arithmetic number, because the mean of its divisors is an integer number (55743700).

Almost surely, 2^111487399 is an apocalyptic number.

111487399 is a deficient number, since it is larger than the sum of its proper divisors (1).

111487399 is an equidigital number, since it uses as much as digits as its factorization.

111487399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 43.

The square root of 111487399 is about 10558.7593494690. The cubic root of 111487399 is about 481.2919463297.

The spelling of 111487399 in words is "one hundred eleven million, four hundred eighty-seven thousand, three hundred ninety-nine".