1418884681 has 2 divisors, whose sum is σ = 1418884682. Its totient is φ = 1418884680.

The previous prime is 1418884639. The next prime is 1418884693. The reversal of 1418884681 is 1864888141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1373443600 + 45441081 = 37060^2 + 6741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1418884681 is a prime.

It is a super-2 number, since 2×1418884681² = 4026467475952943522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1418884781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 709442340 + 709442341.

It is an arithmetic number, because the mean of its divisors is an integer number (709442341).

Almost surely, 2^1418884681 is an apocalyptic number.

It is an amenable number.

1418884681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1418884681 is an equidigital number, since it uses as much as digits as its factorization.

1418884681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393216, while the sum is 49.

The square root of 1418884681 is about 37668.0857092579. The cubic root of 1418884681 is about 1123.6965132715.

The spelling of 1418884681 in words is "one billion, four hundred eighteen million, eight hundred eighty-four thousand, six hundred eighty-one".