653503963 has 16 divisors (see below), whose sum is σ = 774918144. Its totient is φ = 539290080.

The previous prime is 653503943. The next prime is 653503967. The reversal of 653503963 is 369305356.

It is a happy number.

It is not a de Polignac number, because 653503963 - 2⁵ = 653503931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (653503967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35106 + ... + 50392.

It is an arithmetic number, because the mean of its divisors is an integer number (48432384).

Almost surely, 2^653503963 is an apocalyptic number.

653503963 is a deficient number, since it is larger than the sum of its proper divisors (121414181).

653503963 is a wasteful number, since it uses less digits than its factorization.

653503963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15522.

The product of its (nonzero) digits is 218700, while the sum is 40.

The square root of 653503963 is about 25563.7235746282. The cubic root of 653503963 is about 867.7928653210.

The spelling of 653503963 in words is "six hundred fifty-three million, five hundred three thousand, nine hundred sixty-three".