1013120643 has 8 divisors (see below), whose sum is σ = 1387336528. Its totient is φ = 657159264.

The previous prime is 1013120639. The next prime is 1013120651. The reversal of 1013120643 is 3460213101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1013120643 - 2² = 1013120639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1013120623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4563496 + ... + 4563717.

It is an arithmetic number, because the mean of its divisors is an integer number (173417066).

Almost surely, 2^1013120643 is an apocalyptic number.

1013120643 is a deficient number, since it is larger than the sum of its proper divisors (374215885).

1013120643 is an equidigital number, since it uses as much as digits as its factorization.

1013120643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9127253.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1013120643 is about 31829.5561232010. The cubic root of 1013120643 is about 1004.3545579676.

Adding to 1013120643 its reverse (3460213101), we get a palindrome (4473333744).

The spelling of 1013120643 in words is "one billion, thirteen million, one hundred twenty thousand, six hundred forty-three".