53287397 has 4 divisors (see below), whose sum is σ = 53349036. Its totient is φ = 53225760.

The previous prime is 53287379. The next prime is 53287427. The reversal of 53287397 is 79378235.

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 47141956 + 6145441 = 6866^2 + 2479^2 .

It is a cyclic number.

It is not a de Polignac number, because 53287397 - 2²⁰ = 52238821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53287307) 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, 29504 + ... + 31257.

It is an arithmetic number, because the mean of its divisors is an integer number (13337259).

Almost surely, 2^53287397 is an apocalyptic number.

It is an amenable number.

53287397 is a deficient number, since it is larger than the sum of its proper divisors (61639).

53287397 is an equidigital number, since it uses as much as digits as its factorization.

53287397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61638.

The product of its digits is 317520, while the sum is 44.

The square root of 53287397 is about 7299.8217101516. The cubic root of 53287397 is about 376.3063111489.

The spelling of 53287397 in words is "fifty-three million, two hundred eighty-seven thousand, three hundred ninety-seven".