52971997 has 4 divisors (see below), whose sum is σ = 57046780. Its totient is φ = 48897216.

The previous prime is 52971977. The next prime is 52972037. The reversal of 52971997 is 79917925.

52971997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 5788836 + 47183161 = 2406^2 + 6869^2 .

It is a cyclic number.

It is not a de Polignac number, because 52971997 - 2⁷ = 52971869 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 52971997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52971907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2037372 + ... + 2037397.

It is an arithmetic number, because the mean of its divisors is an integer number (14261695).

Almost surely, 2^52971997 is an apocalyptic number.

It is an amenable number.

52971997 is a deficient number, since it is larger than the sum of its proper divisors (4074783).

52971997 is a wasteful number, since it uses less digits than its factorization.

52971997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074782.

The product of its digits is 357210, while the sum is 49.

The square root of 52971997 is about 7278.1863812354. The cubic root of 52971997 is about 375.5624082517.

The spelling of 52971997 in words is "fifty-two million, nine hundred seventy-one thousand, nine hundred ninety-seven".