1097556433 has 4 divisors (see below), whose sum is σ = 1097626608. Its totient is φ = 1097486260.

The previous prime is 1097556403. The next prime is 1097556437. The reversal of 1097556433 is 3346557901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1097556433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1097556433.

It is not an unprimeable number, because it can be changed into a prime (1097556437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210 + ... + 46852.

It is an arithmetic number, because the mean of its divisors is an integer number (274406652).

Almost surely, 2^1097556433 is an apocalyptic number.

It is an amenable number.

1097556433 is a deficient number, since it is larger than the sum of its proper divisors (70175).

1097556433 is an equidigital number, since it uses as much as digits as its factorization.

1097556433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70174.

The product of its (nonzero) digits is 340200, while the sum is 43.

The square root of 1097556433 is about 33129.3892639149. The cubic root of 1097556433 is about 1031.5151712924.

The spelling of 1097556433 in words is "one billion, ninety-seven million, five hundred fifty-six thousand, four hundred thirty-three".