1089418987 has 2 divisors, whose sum is σ = 1089418988. Its totient is φ = 1089418986.

The previous prime is 1089418963. The next prime is 1089418999. The reversal of 1089418987 is 7898149801.

It is a strong prime.

It is an emirp because it is prime and its reverse (7898149801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1089418987 - 2⁷ = 1089418859 is a prime.

It is a super-2 number, since 2×1089418987² = 2373667458472212338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1089458987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544709493 + 544709494.

It is an arithmetic number, because the mean of its divisors is an integer number (544709494).

Almost surely, 2^1089418987 is an apocalyptic number.

1089418987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089418987 is an equidigital number, since it uses as much as digits as its factorization.

1089418987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 55.

The square root of 1089418987 is about 33006.3476773787. The cubic root of 1089418987 is about 1028.9595762271.

The spelling of 1089418987 in words is "one billion, eighty-nine million, four hundred eighteen thousand, nine hundred eighty-seven".