1098556969 has 2 divisors, whose sum is σ = 1098556970. Its totient is φ = 1098556968.

The previous prime is 1098556957. The next prime is 1098556997. The reversal of 1098556969 is 9696558901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1012066969 + 86490000 = 31813^2 + 9300^2 .

It is an emirp because it is prime and its reverse (9696558901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1098556969 - 2⁷ = 1098556841 is a prime.

It is a super-2 number, since 2×1098556969² = 2413654828276933922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1098556169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549278484 + 549278485.

It is an arithmetic number, because the mean of its divisors is an integer number (549278485).

Almost surely, 2^1098556969 is an apocalyptic number.

It is an amenable number.

1098556969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098556969 is an equidigital number, since it uses as much as digits as its factorization.

1098556969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5248800, while the sum is 58.

The square root of 1098556969 is about 33144.4862533725. The cubic root of 1098556969 is about 1031.8285202857.

The spelling of 1098556969 in words is "one billion, ninety-eight million, five hundred fifty-six thousand, nine hundred sixty-nine".