111748639 has 2 divisors, whose sum is σ = 111748640. Its totient is φ = 111748638.

The previous prime is 111748631. The next prime is 111748643. The reversal of 111748639 is 936847111.

It is a strong prime.

It is an emirp because it is prime and its reverse (936847111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111748639 - 2³ = 111748631 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111748631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55874319 + 55874320.

It is an arithmetic number, because the mean of its divisors is an integer number (55874320).

Almost surely, 2^111748639 is an apocalyptic number.

111748639 is a deficient number, since it is larger than the sum of its proper divisors (1).

111748639 is an equidigital number, since it uses as much as digits as its factorization.

111748639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 111748639 is about 10571.1228826459. The cubic root of 111748639 is about 481.6675781057.

The spelling of 111748639 in words is "one hundred eleven million, seven hundred forty-eight thousand, six hundred thirty-nine".