1110643621 has 2 divisors, whose sum is σ = 1110643622. Its totient is φ = 1110643620.

The previous prime is 1110643607. The next prime is 1110643661. The reversal of 1110643621 is 1263460111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1101310596 + 9333025 = 33186^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110643621 - 2⁷ = 1110643493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110643601) by changing a digit.

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 as a sum of consecutive naturals, namely, 555321810 + 555321811.

It is an arithmetic number, because the mean of its divisors is an integer number (555321811).

Almost surely, 2^1110643621 is an apocalyptic number.

It is an amenable number.

1110643621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110643621 is an equidigital number, since it uses as much as digits as its factorization.

1110643621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1110643621 is about 33326.3202439153. The cubic root of 1110643621 is about 1035.5988882273.

The spelling of 1110643621 in words is "one billion, one hundred ten million, six hundred forty-three thousand, six hundred twenty-one".