842450653 has 4 divisors (see below), whose sum is σ = 919037088. Its totient is φ = 765864220.

The previous prime is 842450639. The next prime is 842450663. The reversal of 842450653 is 356054248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-842450653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842450663) 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, 38293201 + ... + 38293222.

It is an arithmetic number, because the mean of its divisors is an integer number (229759272).

Almost surely, 2^842450653 is an apocalyptic number.

It is an amenable number.

842450653 is a deficient number, since it is larger than the sum of its proper divisors (76586435).

842450653 is a wasteful number, since it uses less digits than its factorization.

842450653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76586434.

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 842450653 is about 29025.0004823428. Note that the first 3 decimals coincide. The cubic root of 842450653 is about 944.4554790647.

The spelling of 842450653 in words is "eight hundred forty-two million, four hundred fifty thousand, six hundred fifty-three".