111438407 has 2 divisors, whose sum is σ = 111438408. Its totient is φ = 111438406.

The previous prime is 111438391. The next prime is 111438421. The reversal of 111438407 is 704834111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111438407 - 2⁴ = 111438391 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111438407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111438307) 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, 55719203 + 55719204.

It is an arithmetic number, because the mean of its divisors is an integer number (55719204).

Almost surely, 2^111438407 is an apocalyptic number.

111438407 is a deficient number, since it is larger than the sum of its proper divisors (1).

111438407 is an equidigital number, since it uses as much as digits as its factorization.

111438407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 111438407 is about 10556.4391250080. The cubic root of 111438407 is about 481.2214363887.

The spelling of 111438407 in words is "one hundred eleven million, four hundred thirty-eight thousand, four hundred seven".