53477209 has 4 divisors (see below), whose sum is σ = 53977104. Its totient is φ = 52977316.

The previous prime is 53477197. The next prime is 53477219. The reversal of 53477209 is 90277435.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53477209 - 2²¹ = 51380057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53477219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249787 + ... + 250000.

It is an arithmetic number, because the mean of its divisors is an integer number (13494276).

Almost surely, 2^53477209 is an apocalyptic number.

It is an amenable number.

53477209 is a deficient number, since it is larger than the sum of its proper divisors (499895).

53477209 is a wasteful number, since it uses less digits than its factorization.

53477209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499894.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 53477209 is about 7312.8112925195. The cubic root of 53477209 is about 376.7525881034.

The spelling of 53477209 in words is "fifty-three million, four hundred seventy-seven thousand, two hundred nine".