133789643 has 16 divisors (see below), whose sum is σ = 159195456. Its totient is φ = 111175680.

The previous prime is 133789613. The next prime is 133789651. The reversal of 133789643 is 346987331.

It is a cyclic number.

It is not a de Polignac number, because 133789643 - 2²² = 129595339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133789594 and 133789603.

It is not an unprimeable number, because it can be changed into a prime (133789613) 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, 8078 + ... + 18243.

It is an arithmetic number, because the mean of its divisors is an integer number (9949716).

Almost surely, 2^133789643 is an apocalyptic number.

133789643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

133789643 is a deficient number, since it is larger than the sum of its proper divisors (25405813).

133789643 is a wasteful number, since it uses less digits than its factorization.

133789643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26374.

The product of its digits is 326592, while the sum is 44.

The square root of 133789643 is about 11566.7472955883. The cubic root of 133789643 is about 511.4550820271.

The spelling of 133789643 in words is "one hundred thirty-three million, seven hundred eighty-nine thousand, six hundred forty-three".