642463243 has 4 divisors (see below), whose sum is σ = 650203848. Its totient is φ = 634722640.

The previous prime is 642463231. The next prime is 642463247. The reversal of 642463243 is 342364246.

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

It is a cyclic number.

It is not a de Polignac number, because 642463243 - 2⁹ = 642462731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642463199 and 642463208.

It is not an unprimeable number, because it can be changed into a prime (642463247) 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, 3870178 + ... + 3870343.

It is an arithmetic number, because the mean of its divisors is an integer number (162550962).

Almost surely, 2^642463243 is an apocalyptic number.

642463243 is a deficient number, since it is larger than the sum of its proper divisors (7740605).

642463243 is an equidigital number, since it uses as much as digits as its factorization.

642463243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740604.

The product of its digits is 82944, while the sum is 34.

The square root of 642463243 is about 25346.8586416542. The cubic root of 642463243 is about 862.8780639847.

The spelling of 642463243 in words is "six hundred forty-two million, four hundred sixty-three thousand, two hundred forty-three".