129400537 has 4 divisors (see below), whose sum is σ = 147886336. Its totient is φ = 110914740.

The previous prime is 129400501. The next prime is 129400543. The reversal of 129400537 is 735004921.

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 not a de Polignac number, because 129400537 - 2¹⁹ = 128876249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129400499 and 129400508.

It is not an unprimeable number, because it can be changed into a prime (129400547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9242889 + ... + 9242902.

It is an arithmetic number, because the mean of its divisors is an integer number (36971584).

Almost surely, 2^129400537 is an apocalyptic number.

It is an amenable number.

129400537 is a deficient number, since it is larger than the sum of its proper divisors (18485799).

129400537 is an equidigital number, since it uses as much as digits as its factorization.

129400537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18485798.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 129400537 is about 11375.4356839639. The cubic root of 129400537 is about 505.7998461083.

The spelling of 129400537 in words is "one hundred twenty-nine million, four hundred thousand, five hundred thirty-seven".