53909285 has 4 divisors (see below), whose sum is σ = 64691148. Its totient is φ = 43127424.

The previous prime is 53909269. The next prime is 53909291. The reversal of 53909285 is 58290935.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58290935 = 5 ⋅11658187.

It can be written as a sum of positive squares in 2 ways, for example, as 26388769 + 27520516 = 5137^2 + 5246^2 .

It is a cyclic number.

It is not a de Polignac number, because 53909285 - 2⁴ = 53909269 is a prime.

It is a super-2 number, since 2×53909285² = 5812422018422450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5390924 + ... + 5390933.

It is an arithmetic number, because the mean of its divisors is an integer number (16172787).

Almost surely, 2^53909285 is an apocalyptic number.

It is an amenable number.

53909285 is a deficient number, since it is larger than the sum of its proper divisors (10781863).

53909285 is a wasteful number, since it uses less digits than its factorization.

53909285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10781862.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 53909285 is about 7342.2942599708. The cubic root of 53909285 is about 377.7645412670.

The spelling of 53909285 in words is "fifty-three million, nine hundred nine thousand, two hundred eighty-five".