1097942555 has 4 divisors (see below), whose sum is σ = 1317531072. Its totient is φ = 878354040.

The previous prime is 1097942543. The next prime is 1097942563. The reversal of 1097942555 is 5552497901.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1097942555 - 2⁴ = 1097942539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109794251 + ... + 109794260.

It is an arithmetic number, because the mean of its divisors is an integer number (329382768).

Almost surely, 2^1097942555 is an apocalyptic number.

1097942555 is a deficient number, since it is larger than the sum of its proper divisors (219588517).

1097942555 is an equidigital number, since it uses as much as digits as its factorization.

1097942555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219588516.

The product of its (nonzero) digits is 567000, while the sum is 47.

The square root of 1097942555 is about 33135.2162359022. The cubic root of 1097942555 is about 1031.6361199719.

The spelling of 1097942555 in words is "one billion, ninety-seven million, nine hundred forty-two thousand, five hundred fifty-five".