918464821 has 8 divisors (see below), whose sum is σ = 962748864. Its totient is φ = 875222880.

The previous prime is 918464783. The next prime is 918464849. The reversal of 918464821 is 128464819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 918464821 - 2¹¹ = 918462773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918464891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258721 + ... + 262246.

It is an arithmetic number, because the mean of its divisors is an integer number (120343608).

Almost surely, 2^918464821 is an apocalyptic number.

It is an amenable number.

918464821 is a deficient number, since it is larger than the sum of its proper divisors (44284043).

918464821 is a wasteful number, since it uses less digits than its factorization.

918464821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521051.

The product of its digits is 110592, while the sum is 43.

The square root of 918464821 is about 30306.1845338538. The cubic root of 918464821 is about 972.0475475197.

The spelling of 918464821 in words is "nine hundred eighteen million, four hundred sixty-four thousand, eight hundred twenty-one".