53772889 has 3 divisors (see below), whose sum is σ = 53780223. Its totient is φ = 53765556.

The previous prime is 53772883. The next prime is 53772893. The reversal of 53772889 is 98827735.

The square root of 53772889 is 7333.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 366025 + 53406864 = 605^2 + 7308^2 .

It is not a de Polignac number, because 53772889 - 2²¹ = 51675737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53772883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3667 + ... + 10999.

It is an arithmetic number, because the mean of its divisors is an integer number (17926741).

Almost surely, 2^53772889 is an apocalyptic number.

53772889 is the 7333-rd square number.

53772889 is the 3667-th centered octagonal number.

It is an amenable number.

53772889 is a deficient number, since it is larger than the sum of its proper divisors (7334).

53772889 is an frugal number, since it uses more digits than its factorization.

53772889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14666 (or 7333 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The cubic root of 53772889 is about 377.4456778990.

Multiplying 53772889 by its sum of digits (49), we get a square (2634871561 = 51331²).

The spelling of 53772889 in words is "fifty-three million, seven hundred seventy-two thousand, eight hundred eighty-nine".