133549639 has 2 divisors, whose sum is σ = 133549640. Its totient is φ = 133549638.

The previous prime is 133549621. The next prime is 133549657. The reversal of 133549639 is 936945331.

It is a balanced prime because it is at equal distance from previous prime (133549621) and next prime (133549657).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133549639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133549595 and 133549604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133549439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66774819 + 66774820.

It is an arithmetic number, because the mean of its divisors is an integer number (66774820).

Almost surely, 2^133549639 is an apocalyptic number.

133549639 is a deficient number, since it is larger than the sum of its proper divisors (1).

133549639 is an equidigital number, since it uses as much as digits as its factorization.

133549639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 43.

The square root of 133549639 is about 11556.3678982628. The cubic root of 133549639 is about 511.1490674588.

The spelling of 133549639 in words is "one hundred thirty-three million, five hundred forty-nine thousand, six hundred thirty-nine".