5642123827 has 4 divisors (see below), whose sum is σ = 5642287696. Its totient is φ = 5641959960.

The previous prime is 5642123807. The next prime is 5642123849. The reversal of 5642123827 is 7283212465.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5642123827 is a prime.

It is a super-2 number, since 2×5642123827² = 63667122558402251858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5642123827.

It is not an unprimeable number, because it can be changed into a prime (5642123807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8124 + ... + 106537.

It is an arithmetic number, because the mean of its divisors is an integer number (1410571924).

Almost surely, 2^5642123827 is an apocalyptic number.

5642123827 is a deficient number, since it is larger than the sum of its proper divisors (163869).

5642123827 is a wasteful number, since it uses less digits than its factorization.

5642123827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163868.

The product of its digits is 161280, while the sum is 40.

The square root of 5642123827 is about 75114.0720970445. The cubic root of 5642123827 is about 1780.2494944434.

The spelling of 5642123827 in words is "five billion, six hundred forty-two million, one hundred twenty-three thousand, eight hundred twenty-seven".