129669493 has 4 divisors (see below), whose sum is σ = 129850560. Its totient is φ = 129488428.

The previous prime is 129669473. The next prime is 129669521. The reversal of 129669493 is 394966921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129669493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129669443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89455 + ... + 90892.

It is an arithmetic number, because the mean of its divisors is an integer number (32462640).

Almost surely, 2^129669493 is an apocalyptic number.

It is an amenable number.

129669493 is a deficient number, since it is larger than the sum of its proper divisors (181067).

129669493 is an equidigital number, since it uses as much as digits as its factorization.

129669493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181066.

The product of its digits is 629856, while the sum is 49.

The square root of 129669493 is about 11387.2513364727. The cubic root of 129669493 is about 506.1500346642.

The spelling of 129669493 in words is "one hundred twenty-nine million, six hundred sixty-nine thousand, four hundred ninety-three".