129490853 has 4 divisors (see below), whose sum is σ = 137107980. Its totient is φ = 121873728.

The previous prime is 129490849. The next prime is 129490883. The reversal of 129490853 is 358094921.

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 58644964 + 70845889 = 7658^2 + 8417^2 .

It is a cyclic number.

It is not a de Polignac number, because 129490853 - 2² = 129490849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129490853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129490883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3808538 + ... + 3808571.

It is an arithmetic number, because the mean of its divisors is an integer number (34276995).

Almost surely, 2^129490853 is an apocalyptic number.

It is an amenable number.

129490853 is a deficient number, since it is larger than the sum of its proper divisors (7617127).

129490853 is an equidigital number, since it uses as much as digits as its factorization.

129490853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7617126.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 129490853 is about 11379.4047735371. The cubic root of 129490853 is about 505.9174942420.

The spelling of 129490853 in words is "one hundred twenty-nine million, four hundred ninety thousand, eight hundred fifty-three".