1002658643 has 4 divisors (see below), whose sum is σ = 1145895600. Its totient is φ = 859421688.

The previous prime is 1002658609. The next prime is 1002658651. The reversal of 1002658643 is 3468562001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3468562001 = 709 ⋅4892189.

It is a cyclic number.

It is not a de Polignac number, because 1002658643 - 2²⁶ = 935549779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002658693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71618468 + ... + 71618481.

It is an arithmetic number, because the mean of its divisors is an integer number (286473900).

Almost surely, 2^1002658643 is an apocalyptic number.

1002658643 is a deficient number, since it is larger than the sum of its proper divisors (143236957).

1002658643 is an equidigital number, since it uses as much as digits as its factorization.

1002658643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143236956.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1002658643 is about 31664.7855353546. The cubic root of 1002658643 is about 1000.8854301155.

The spelling of 1002658643 in words is "one billion, two million, six hundred fifty-eight thousand, six hundred forty-three".