918278131 has 2 divisors, whose sum is σ = 918278132. Its totient is φ = 918278130.

The previous prime is 918278129. The next prime is 918278143. The reversal of 918278131 is 131872819.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 918278131 - 2¹ = 918278129 is a prime.

It is a super-2 number, since 2×918278131² = 1686469451745706322, which contains 22 as substring.

Together with 918278129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (918278191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459139065 + 459139066.

It is an arithmetic number, because the mean of its divisors is an integer number (459139066).

Almost surely, 2^918278131 is an apocalyptic number.

918278131 is a deficient number, since it is larger than the sum of its proper divisors (1).

918278131 is an equidigital number, since it uses as much as digits as its factorization.

918278131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 40.

The square root of 918278131 is about 30303.1043129248. The cubic root of 918278131 is about 971.9816825933.

The spelling of 918278131 in words is "nine hundred eighteen million, two hundred seventy-eight thousand, one hundred thirty-one".