1081220623 has 24 divisors (see below), whose sum is σ = 1308264000. Its totient is φ = 890180928.

The previous prime is 1081220611. The next prime is 1081220653. The reversal of 1081220623 is 3260221801.

It is not a de Polignac number, because 1081220623 - 2²⁹ = 544349711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081220603) 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 in 23 ways as a sum of consecutive naturals, for example, 139453 + ... + 147001.

It is an arithmetic number, because the mean of its divisors is an integer number (54511000).

Almost surely, 2^1081220623 is an apocalyptic number.

1081220623 is a deficient number, since it is larger than the sum of its proper divisors (227043377).

1081220623 is an equidigital number, since it uses as much as digits as its factorization.

1081220623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7679 (or 7672 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1081220623 is about 32881.9193934904. The cubic root of 1081220623 is about 1026.3719476592.

The spelling of 1081220623 in words is "one billion, eighty-one million, two hundred twenty thousand, six hundred twenty-three".