53520389 has 8 divisors (see below), whose sum is σ = 59195640. Its totient is φ = 48067776.

The previous prime is 53520377. The next prime is 53520391. The reversal of 53520389 is 98302535.

It can be written as a sum of positive squares in 4 ways, for example, as 4169764 + 49350625 = 2042^2 + 7025^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53520389 - 2⁴ = 53520373 is a prime.

It is a super-2 number, since 2×53520389² = 5728864077422642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53520319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55154 + ... + 56115.

It is an arithmetic number, because the mean of its divisors is an integer number (7399455).

Almost surely, 2^53520389 is an apocalyptic number.

It is an amenable number.

53520389 is a deficient number, since it is larger than the sum of its proper divisors (5675251).

53520389 is a wasteful number, since it uses less digits than its factorization.

53520389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111319.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 53520389 is about 7315.7630497440. The cubic root of 53520389 is about 376.8539633775.

The spelling of 53520389 in words is "fifty-three million, five hundred twenty thousand, three hundred eighty-nine".