1080389657 has 4 divisors (see below), whose sum is σ = 1082512740. Its totient is φ = 1078266576.

The previous prime is 1080389641. The next prime is 1080389659. The reversal of 1080389657 is 7569830801.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 882030601 + 198359056 = 29699^2 + 14084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1080389657 - 2⁴ = 1080389641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1080389659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060778 + ... + 1061795.

It is an arithmetic number, because the mean of its divisors is an integer number (270628185).

Almost surely, 2^1080389657 is an apocalyptic number.

It is an amenable number.

1080389657 is a deficient number, since it is larger than the sum of its proper divisors (2123083).

1080389657 is an equidigital number, since it uses as much as digits as its factorization.

1080389657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123082.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1080389657 is about 32869.2813581313. The cubic root of 1080389657 is about 1026.1089428173.

The spelling of 1080389657 in words is "one billion, eighty million, three hundred eighty-nine thousand, six hundred fifty-seven".