1013001643 has 2 divisors, whose sum is σ = 1013001644. Its totient is φ = 1013001642.

The previous prime is 1013001641. The next prime is 1013001653. The reversal of 1013001643 is 3461003101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1013001643 - 2¹ = 1013001641 is a prime.

Together with 1013001641, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1013001643.

It is not a weakly prime, because it can be changed into another prime (1013001641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506500821 + 506500822.

It is an arithmetic number, because the mean of its divisors is an integer number (506500822).

Almost surely, 2^1013001643 is an apocalyptic number.

1013001643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013001643 is an equidigital number, since it uses as much as digits as its factorization.

1013001643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1013001643 is about 31827.6867365506. The cubic root of 1013001643 is about 1004.3152329793.

Adding to 1013001643 its reverse (3461003101), we get a palindrome (4474004744).

The spelling of 1013001643 in words is "one billion, thirteen million, one thousand, six hundred forty-three".