918640103 has 12 divisors (see below), whose sum is σ = 946588464. Its totient is φ = 891172800.

The previous prime is 918640097. The next prime is 918640109. The reversal of 918640103 is 301046819.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (918640097) and next prime (918640109).

It is not a de Polignac number, because 918640103 - 2⁴ = 918640087 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 918640103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918640109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2181833 + ... + 2182253.

It is an arithmetic number, because the mean of its divisors is an integer number (78882372).

Almost surely, 2^918640103 is an apocalyptic number.

918640103 is a deficient number, since it is larger than the sum of its proper divisors (27948361).

918640103 is an frugal number, since it uses more digits than its factorization.

918640103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 918640103 is about 30309.0762478832. The cubic root of 918640103 is about 972.1093795379.

The spelling of 918640103 in words is "nine hundred eighteen million, six hundred forty thousand, one hundred three".