1218952487 has 2 divisors, whose sum is σ = 1218952488. Its totient is φ = 1218952486.

The previous prime is 1218952387. The next prime is 1218952499. The reversal of 1218952487 is 7842598121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1218952487 - 2²² = 1214758183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218952187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609476243 + 609476244.

It is an arithmetic number, because the mean of its divisors is an integer number (609476244).

Almost surely, 2^1218952487 is an apocalyptic number.

1218952487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218952487 is an equidigital number, since it uses as much as digits as its factorization.

1218952487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 47.

The square root of 1218952487 is about 34913.5000680253. The cubic root of 1218952487 is about 1068.2238232402.

The spelling of 1218952487 in words is "one billion, two hundred eighteen million, nine hundred fifty-two thousand, four hundred eighty-seven".