52391929 has 4 divisors (see below), whose sum is σ = 52513920. Its totient is φ = 52269940.

The previous prime is 52391921. The next prime is 52391939. The reversal of 52391929 is 92919325.

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 52391929 - 2³ = 52391921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52391891 and 52391900.

It is not an unprimeable number, because it can be changed into a prime (52391921) 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, 60349 + ... + 61210.

It is an arithmetic number, because the mean of its divisors is an integer number (13128480).

Almost surely, 2^52391929 is an apocalyptic number.

It is an amenable number.

52391929 is a deficient number, since it is larger than the sum of its proper divisors (121991).

52391929 is a wasteful number, since it uses less digits than its factorization.

52391929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121990.

The product of its digits is 43740, while the sum is 40.

The square root of 52391929 is about 7238.2269237708. The cubic root of 52391929 is about 374.1865127268.

The spelling of 52391929 in words is "fifty-two million, three hundred ninety-one thousand, nine hundred twenty-nine".