653553243 has 48 divisors (see below), whose sum is σ = 1109664192. Its totient is φ = 362880000.

The previous prime is 653553239. The next prime is 653553293. The reversal of 653553243 is 342355356.

653553243 is a `hidden beast` number, since 65 + 3 + 553 + 2 + 43 = 666.

It is not a de Polignac number, because 653553243 - 2² = 653553239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 653553198 and 653553207.

It is not an unprimeable number, because it can be changed into a prime (653553223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1087143 + ... + 1087743.

It is an arithmetic number, because the mean of its divisors is an integer number (23118004).

Almost surely, 2^653553243 is an apocalyptic number.

653553243 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

653553243 is a deficient number, since it is larger than the sum of its proper divisors (456110949).

653553243 is a wasteful number, since it uses less digits than its factorization.

653553243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 1073 counting only the distinct ones).

The product of its digits is 162000, while the sum is 36.

The square root of 653553243 is about 25564.6874223019. The cubic root of 653553243 is about 867.8146778679.

It can be divided in two parts, 653553 and 243, that added together give a triangular number (653796 = T₁₁₄₃).

The spelling of 653553243 in words is "six hundred fifty-three million, five hundred fifty-three thousand, two hundred forty-three".