842556623 has 4 divisors (see below), whose sum is σ = 842671440. Its totient is φ = 842441808.

The previous prime is 842556613. The next prime is 842556641. The reversal of 842556623 is 326655248.

It is a happy number.

842556623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 842556623 - 2¹⁰ = 842555599 is a prime.

It is a super-2 number, since 2×842556623² = 1419803325922328258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842556613) 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, 45590 + ... + 61347.

It is an arithmetic number, because the mean of its divisors is an integer number (210667860).

Almost surely, 2^842556623 is an apocalyptic number.

842556623 is a deficient number, since it is larger than the sum of its proper divisors (114817).

842556623 is a wasteful number, since it uses less digits than its factorization.

842556623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114816.

The product of its digits is 345600, while the sum is 41.

The square root of 842556623 is about 29026.8259201725. The cubic root of 842556623 is about 944.4950777247.

The spelling of 842556623 in words is "eight hundred forty-two million, five hundred fifty-six thousand, six hundred twenty-three".