918457 has 4 divisors (see below), whose sum is σ = 923940. Its totient is φ = 912976.

The previous prime is 918443. The next prime is 918469. The reversal of 918457 is 754819.

It is a happy number.

918457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 346921 + 571536 = 589^2 + 756^2 .

It is a cyclic number.

It is not a de Polignac number, because 918457 - 2⁷ = 918329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (918497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2482 + ... + 2827.

It is an arithmetic number, because the mean of its divisors is an integer number (230985).

2⁹¹⁸⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

918457 is a deficient number, since it is larger than the sum of its proper divisors (5483).

918457 is a wasteful number, since it uses less digits than its factorization.

918457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5482.

The product of its digits is 10080, while the sum is 34.

The square root of 918457 is about 958.3616227709. The cubic root of 918457 is about 97.2044788421.

The spelling of 918457 in words is "nine hundred eighteen thousand, four hundred fifty-seven".