129202993 has 4 divisors (see below), whose sum is σ = 130026100. Its totient is φ = 128379888.

The previous prime is 129202987. The next prime is 129203017. The reversal of 129202993 is 399202921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64448784 + 64754209 = 8028^2 + 8047^2 .

It is a cyclic number.

It is not a de Polignac number, because 129202993 - 2⁵ = 129202961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129202693) 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, 411318 + ... + 411631.

It is an arithmetic number, because the mean of its divisors is an integer number (32506525).

Almost surely, 2^129202993 is an apocalyptic number.

It is an amenable number.

129202993 is a deficient number, since it is larger than the sum of its proper divisors (823107).

129202993 is an equidigital number, since it uses as much as digits as its factorization.

129202993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823106.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 129202993 is about 11366.7494474014. The cubic root of 129202993 is about 505.5423288538.

The spelling of 129202993 in words is "one hundred twenty-nine million, two hundred two thousand, nine hundred ninety-three".