1118622643 has 2 divisors, whose sum is σ = 1118622644. Its totient is φ = 1118622642.

The previous prime is 1118622523. The next prime is 1118622653. The reversal of 1118622643 is 3462268111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118622643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1118622599 and 1118622608.

It is not a weakly prime, because it can be changed into another prime (1118622653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559311321 + 559311322.

It is an arithmetic number, because the mean of its divisors is an integer number (559311322).

Almost surely, 2^1118622643 is an apocalyptic number.

1118622643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118622643 is an equidigital number, since it uses as much as digits as its factorization.

1118622643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 1118622643 is about 33445.8165246418. The cubic root of 1118622643 is about 1038.0729363302.

The spelling of 1118622643 in words is "one billion, one hundred eighteen million, six hundred twenty-two thousand, six hundred forty-three".