918407 has 6 divisors (see below), whose sum is σ = 1068408. Its totient is φ = 787164.

The previous prime is 918397. The next prime is 918431. The reversal of 918407 is 704819.

It is not a de Polignac number, because 918407 - 2¹⁶ = 852871 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 918407.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 9323 + ... + 9420.

It is an arithmetic number, because the mean of its divisors is an integer number (178068).

2⁹¹⁸⁴⁰⁷ is an apocalyptic number.

918407 is a deficient number, since it is larger than the sum of its proper divisors (150001).

918407 is a wasteful number, since it uses less digits than its factorization.

918407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18757 (or 18750 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 918407 is about 958.3355362294. The cubic root of 918407 is about 97.2027149010.

The spelling of 918407 in words is "nine hundred eighteen thousand, four hundred seven".