918348431 has 32 divisors (see below), whose sum is σ = 1251522048. Its totient is φ = 650643840.

The previous prime is 918348391. The next prime is 918348443. The reversal of 918348431 is 134843819.

It is not a de Polignac number, because 918348431 - 2¹⁸ = 918086287 is a prime.

It is a super-2 number, since 2×918348431² = 1686727681440323522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918348131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60221 + ... + 73913.

It is an arithmetic number, because the mean of its divisors is an integer number (39110064).

Almost surely, 2^918348431 is an apocalyptic number.

918348431 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

918348431 is a deficient number, since it is larger than the sum of its proper divisors (333173617).

918348431 is a wasteful number, since it uses less digits than its factorization.

918348431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13791.

The product of its digits is 82944, while the sum is 41.

The square root of 918348431 is about 30304.2642378923. The cubic root of 918348431 is about 972.0064857425.

The spelling of 918348431 in words is "nine hundred eighteen million, three hundred forty-eight thousand, four hundred thirty-one".