918861487 has 2 divisors, whose sum is σ = 918861488. Its totient is φ = 918861486.

The previous prime is 918861479. The next prime is 918861499. The reversal of 918861487 is 784168819.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 918861487 - 2³ = 918861479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918861467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459430743 + 459430744.

It is an arithmetic number, because the mean of its divisors is an integer number (459430744).

Almost surely, 2^918861487 is an apocalyptic number.

918861487 is a deficient number, since it is larger than the sum of its proper divisors (1).

918861487 is an equidigital number, since it uses as much as digits as its factorization.

918861487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 52.

The square root of 918861487 is about 30312.7281352240. The cubic root of 918861487 is about 972.1874631373.

The spelling of 918861487 in words is "nine hundred eighteen million, eight hundred sixty-one thousand, four hundred eighty-seven".