133643653 has 12 divisors (see below), whose sum is σ = 158199244. Its totient is φ = 112147200.

The previous prime is 133643651. The next prime is 133643689. The reversal of 133643653 is 356346331.

It can be written as a sum of positive squares in 2 ways, for example, as 55621764 + 78021889 = 7458^2 + 8833^2 .

It is not a de Polignac number, because 133643653 - 2¹ = 133643651 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133643651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40908 + ... + 44053.

Almost surely, 2^133643653 is an apocalyptic number.

133643653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

133643653 is a deficient number, since it is larger than the sum of its proper divisors (24555591).

133643653 is a wasteful number, since it uses less digits than its factorization.

133643653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84996 (or 84985 counting only the distinct ones).

The product of its digits is 58320, while the sum is 34.

The square root of 133643653 is about 11560.4348101618. The cubic root of 133643653 is about 511.2689826625.

Adding to 133643653 its reverse (356346331), we get a palindrome (489989984).

The spelling of 133643653 in words is "one hundred thirty-three million, six hundred forty-three thousand, six hundred fifty-three".