111903459817 has 2 divisors, whose sum is σ = 111903459818. Its totient is φ = 111903459816.

The previous prime is 111903459809. The next prime is 111903459881. The reversal of 111903459817 is 718954309111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103660817296 + 8242642521 = 321964^2 + 90789^2 .

It is a cyclic number.

It is not a de Polignac number, because 111903459817 - 2³ = 111903459809 is a prime.

It is a super-4 number, since 4×111903459817⁴ (a number of 45 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (111903459617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55951729908 + 55951729909.

It is an arithmetic number, because the mean of its divisors is an integer number (55951729909).

Almost surely, 2^111903459817 is an apocalyptic number.

It is an amenable number.

111903459817 is a deficient number, since it is larger than the sum of its proper divisors (1).

111903459817 is an equidigital number, since it uses as much as digits as its factorization.

111903459817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 111903459817 in words is "one hundred eleven billion, nine hundred three million, four hundred fifty-nine thousand, eight hundred seventeen".