129803537 has 4 divisors (see below), whose sum is σ = 129828336. Its totient is φ = 129778740.

The previous prime is 129803489. The next prime is 129803539. The reversal of 129803537 is 735308921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 735308921 = 683 ⋅1076587.

It is a cyclic number.

It is not a de Polignac number, because 129803537 - 2¹⁸ = 129541393 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 129803537.

It is not an unprimeable number, because it can be changed into a prime (129803539) 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, 1139 + ... + 16152.

It is an arithmetic number, because the mean of its divisors is an integer number (32457084).

Almost surely, 2^129803537 is an apocalyptic number.

It is an amenable number.

129803537 is a deficient number, since it is larger than the sum of its proper divisors (24799).

129803537 is an equidigital number, since it uses as much as digits as its factorization.

129803537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24798.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 129803537 is about 11393.1355210056. The cubic root of 129803537 is about 506.3243830754.

The spelling of 129803537 in words is "one hundred twenty-nine million, eight hundred three thousand, five hundred thirty-seven".