918348391 has 2 divisors, whose sum is σ = 918348392. Its totient is φ = 918348390.

The previous prime is 918348359. The next prime is 918348443. The reversal of 918348391 is 193843819.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 918348391 - 2⁵ = 918348359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918348311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459174195 + 459174196.

It is an arithmetic number, because the mean of its divisors is an integer number (459174196).

Almost surely, 2^918348391 is an apocalyptic number.

918348391 is a deficient number, since it is larger than the sum of its proper divisors (1).

918348391 is an equidigital number, since it uses as much as digits as its factorization.

918348391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 918348391 is about 30304.2635779192. The cubic root of 918348391 is about 972.0064716302.

The spelling of 918348391 in words is "nine hundred eighteen million, three hundred forty-eight thousand, three hundred ninety-one".