52129397 has 4 divisors (see below), whose sum is σ = 52143936. Its totient is φ = 52114860.

The previous prime is 52129387. The next prime is 52129421. The reversal of 52129397 is 79392125.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 52129397 - 2⁴ = 52129381 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 52129397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52129307) 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, 2372 + ... + 10482.

It is an arithmetic number, because the mean of its divisors is an integer number (13035984).

Almost surely, 2^52129397 is an apocalyptic number.

It is an amenable number.

52129397 is a deficient number, since it is larger than the sum of its proper divisors (14539).

52129397 is an equidigital number, since it uses as much as digits as its factorization.

52129397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14538.

The product of its digits is 34020, while the sum is 38.

The square root of 52129397 is about 7220.0690439912. The cubic root of 52129397 is about 373.5604590703.

The spelling of 52129397 in words is "fifty-two million, one hundred twenty-nine thousand, three hundred ninety-seven".