253537643 has 8 divisors (see below), whose sum is σ = 268611840. Its totient is φ = 238481280.

The previous prime is 253537639. The next prime is 253537649. The reversal of 253537643 is 346735352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253537643 - 2² = 253537639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253537597 and 253537606.

It is not an unprimeable number, because it can be changed into a prime (253537649) 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 7 ways as a sum of consecutive naturals, for example, 34733 + ... + 41393.

It is an arithmetic number, because the mean of its divisors is an integer number (33576480).

Almost surely, 2^253537643 is an apocalyptic number.

253537643 is a deficient number, since it is larger than the sum of its proper divisors (15074197).

253537643 is a wasteful number, since it uses less digits than its factorization.

253537643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8917.

The product of its digits is 226800, while the sum is 38.

The square root of 253537643 is about 15922.8654142400. The cubic root of 253537643 is about 632.9180521950.

The spelling of 253537643 in words is "two hundred fifty-three million, five hundred thirty-seven thousand, six hundred forty-three".