523448642 has 4 divisors (see below), whose sum is σ = 785172966. Its totient is φ = 261724320.

The previous prime is 523448593. The next prime is 523448647. The reversal of 523448642 is 246844325.

It is a happy number.

It is a Cunningham number, because it is equal to 22879²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 523448641 + 1 = 22879^2 + 1^2 .

It is a junction number, because it is equal to n+sod(n) for n = 523448596 and 523448605.

It is not an unprimeable number, because it can be changed into a prime (523448647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130862159 + ... + 130862162.

Almost surely, 2^523448642 is an apocalyptic number.

523448642 is a deficient number, since it is larger than the sum of its proper divisors (261724324).

523448642 is a wasteful number, since it uses less digits than its factorization.

523448642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261724323.

The product of its digits is 184320, while the sum is 38.

The square root of 523448642 is about 22879.0000218541. Note that the first 4 decimals coincide. The cubic root of 523448642 is about 805.9189341468.

The spelling of 523448642 in words is "five hundred twenty-three million, four hundred forty-eight thousand, six hundred forty-two".