111623749 has 2 divisors, whose sum is σ = 111623750. Its totient is φ = 111623748.

The previous prime is 111623747. The next prime is 111623767. The reversal of 111623749 is 947326111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59567524 + 52056225 = 7718^2 + 7215^2 .

It is a cyclic number.

It is not a de Polignac number, because 111623749 - 2¹ = 111623747 is a prime.

It is a super-2 number, since 2×111623749² = 24919722681630002, which contains 22 as substring.

Together with 111623747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111623747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55811874 + 55811875.

It is an arithmetic number, because the mean of its divisors is an integer number (55811875).

Almost surely, 2^111623749 is an apocalyptic number.

It is an amenable number.

111623749 is a deficient number, since it is larger than the sum of its proper divisors (1).

111623749 is an equidigital number, since it uses as much as digits as its factorization.

111623749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 111623749 is about 10565.2141010015. The cubic root of 111623749 is about 481.4880743905.

The spelling of 111623749 in words is "one hundred eleven million, six hundred twenty-three thousand, seven hundred forty-nine".