53891509 has 8 divisors (see below), whose sum is σ = 62370560. Its totient is φ = 45607536.

The previous prime is 53891503. The next prime is 53891521. The reversal of 53891509 is 90519835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53891509 - 2¹¹ = 53889461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53891503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48174 + ... + 49279.

It is an arithmetic number, because the mean of its divisors is an integer number (7796320).

Almost surely, 2^53891509 is an apocalyptic number.

It is an amenable number.

53891509 is a deficient number, since it is larger than the sum of its proper divisors (8479051).

53891509 is an equidigital number, since it uses as much as digits as its factorization.

53891509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97539.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 53891509 is about 7341.0836393546. The cubic root of 53891509 is about 377.7230154537.

The spelling of 53891509 in words is "fifty-three million, eight hundred ninety-one thousand, five hundred nine".