1002320641 has 4 divisors (see below), whose sum is σ = 1145509312. Its totient is φ = 859131972.

The previous prime is 1002320621. The next prime is 1002320647. The reversal of 1002320641 is 1460232001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1460232001 = 487 ⋅2998423.

It is a cyclic number.

It is not a de Polignac number, because 1002320641 - 2⁷ = 1002320513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002320647) 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, 71594325 + ... + 71594338.

It is an arithmetic number, because the mean of its divisors is an integer number (286377328).

Almost surely, 2^1002320641 is an apocalyptic number.

It is an amenable number.

1002320641 is a deficient number, since it is larger than the sum of its proper divisors (143188671).

1002320641 is an equidigital number, since it uses as much as digits as its factorization.

1002320641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143188670.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1002320641 is about 31659.4478947438. The cubic root of 1002320641 is about 1000.7729493953.

Adding to 1002320641 its reverse (1460232001), we get a palindrome (2462552642).

The spelling of 1002320641 in words is "one billion, two million, three hundred twenty thousand, six hundred forty-one".