918663157 has 2 divisors, whose sum is σ = 918663158. Its totient is φ = 918663156.

The previous prime is 918663133. The next prime is 918663169. The reversal of 918663157 is 751366819.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705911761 + 212751396 = 26569^2 + 14586^2 .

It is a cyclic number.

It is not a de Polignac number, because 918663157 - 2¹¹ = 918661109 is a prime.

It is a super-3 number, since 3×918663157³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918663857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459331578 + 459331579.

It is an arithmetic number, because the mean of its divisors is an integer number (459331579).

Almost surely, 2^918663157 is an apocalyptic number.

It is an amenable number.

918663157 is a deficient number, since it is larger than the sum of its proper divisors (1).

918663157 is an equidigital number, since it uses as much as digits as its factorization.

918663157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 918663157 is about 30309.4565606182. The cubic root of 918663157 is about 972.1175114211.

The spelling of 918663157 in words is "nine hundred eighteen million, six hundred sixty-three thousand, one hundred fifty-seven".