53087789 has 4 divisors (see below), whose sum is σ = 53186460. Its totient is φ = 52989120.

The previous prime is 53087773. The next prime is 53087807. The reversal of 53087789 is 98778035.

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 6165289 + 46922500 = 2483^2 + 6850^2 .

It is a cyclic number.

It is not a de Polignac number, because 53087789 - 2⁴ = 53087773 is a prime.

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 (53087759) 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, 48524 + ... + 49605.

It is an arithmetic number, because the mean of its divisors is an integer number (13296615).

Almost surely, 2^53087789 is an apocalyptic number.

It is an amenable number.

53087789 is a deficient number, since it is larger than the sum of its proper divisors (98671).

53087789 is an equidigital number, since it uses as much as digits as its factorization.

53087789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98670.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 53087789 is about 7286.1367678627. The cubic root of 53087789 is about 375.8358576020.

The spelling of 53087789 in words is "fifty-three million, eighty-seven thousand, seven hundred eighty-nine".