129918533 has 2 divisors, whose sum is σ = 129918534. Its totient is φ = 129918532.

The previous prime is 129918499. The next prime is 129918553. The reversal of 129918533 is 335819921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120077764 + 9840769 = 10958^2 + 3137^2 .

It is a cyclic number.

It is not a de Polignac number, because 129918533 - 2⁶ = 129918469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129918553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64959266 + 64959267.

It is an arithmetic number, because the mean of its divisors is an integer number (64959267).

Almost surely, 2^129918533 is an apocalyptic number.

It is an amenable number.

129918533 is a deficient number, since it is larger than the sum of its proper divisors (1).

129918533 is an equidigital number, since it uses as much as digits as its factorization.

129918533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 129918533 is about 11398.1811268290. The cubic root of 129918533 is about 506.4738604938.

The spelling of 129918533 in words is "one hundred twenty-nine million, nine hundred eighteen thousand, five hundred thirty-three".