53709765 has 16 divisors (see below), whose sum is σ = 87393600. Its totient is φ = 28159232.

The previous prime is 53709743. The next prime is 53709779. The reversal of 53709765 is 56790735.

It is a cyclic number.

It is not a de Polignac number, because 53709765 - 2¹⁸ = 53447621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29460 + ... + 31229.

It is an arithmetic number, because the mean of its divisors is an integer number (5462100).

Almost surely, 2^53709765 is an apocalyptic number.

It is an amenable number.

53709765 is a deficient number, since it is larger than the sum of its proper divisors (33683835).

53709765 is a wasteful number, since it uses less digits than its factorization.

53709765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60756.

The product of its (nonzero) digits is 198450, while the sum is 42.

The square root of 53709765 is about 7328.6946313788. The cubic root of 53709765 is about 377.2979255615.

The spelling of 53709765 in words is "fifty-three million, seven hundred nine thousand, seven hundred sixty-five".