642202623 has 12 divisors (see below), whose sum is σ = 938803320. Its totient is φ = 422976336.

The previous prime is 642202621. The next prime is 642202633. The reversal of 642202623 is 326202246.

It is not a de Polignac number, because 642202623 - 2¹ = 642202621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642202621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 429108 + ... + 430601.

It is an arithmetic number, because the mean of its divisors is an integer number (78233610).

Almost surely, 2^642202623 is an apocalyptic number.

642202623 is a deficient number, since it is larger than the sum of its proper divisors (296600697).

642202623 is a wasteful number, since it uses less digits than its factorization.

642202623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859798 (or 859795 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 642202623 is about 25341.7170491662. The cubic root of 642202623 is about 862.7613705662.

Adding to 642202623 its reverse (326202246), we get a palindrome (968404869).

The spelling of 642202623 in words is "six hundred forty-two million, two hundred two thousand, six hundred twenty-three".