918464781 has 32 divisors (see below), whose sum is σ = 1346647680. Its totient is φ = 553411584.

The previous prime is 918464779. The next prime is 918464783. The reversal of 918464781 is 187464819.

It is an interprime number because it is at equal distance from previous prime (918464779) and next prime (918464783).

It is not a de Polignac number, because 918464781 - 2¹ = 918464779 is a prime.

It is a super-2 number, since 2×918464781² = 1687155107874755922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 918464781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918464783) 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 31 ways as a sum of consecutive naturals, for example, 370161 + ... + 372633.

It is an arithmetic number, because the mean of its divisors is an integer number (42082740).

Almost surely, 2^918464781 is an apocalyptic number.

It is an amenable number.

918464781 is a deficient number, since it is larger than the sum of its proper divisors (428182899).

918464781 is a wasteful number, since it uses less digits than its factorization.

918464781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685.

The product of its digits is 387072, while the sum is 48.

The square root of 918464781 is about 30306.1838739225. The cubic root of 918464781 is about 972.0475334085.

The spelling of 918464781 in words is "nine hundred eighteen million, four hundred sixty-four thousand, seven hundred eighty-one".