53687091 has 32 divisors (see below), whose sum is σ = 77045760. Its totient is φ = 33191424.

The previous prime is 53687077. The next prime is 53687099. The reversal of 53687091 is 19078635.

53687091 is nontrivially palindromic in base 2, base 4 and base 16.

It is not a de Polignac number, because 53687091 - 2⁵ = 53687059 is a prime.

53687091 is an undulating number in base 4.

53687091 is a nontrivial repdigit in base 16.

It is a plaindrome in base 16.

It is a nialpdrome in base 16.

It is a zygodrome in base 2 and base 16.

It is not an unprimeable number, because it can be changed into a prime (53687099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422670 + ... + 422796.

It is an arithmetic number, because the mean of its divisors is an integer number (2407680).

Almost surely, 2^53687091 is an apocalyptic number.

53687091 is a deficient number, since it is larger than the sum of its proper divisors (23358669).

53687091 is a wasteful number, since it uses less digits than its factorization.

53687091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 53687091 is about 7327.1475350234. The cubic root of 53687091 is about 377.2448249923.

The spelling of 53687091 in words is "fifty-three million, six hundred eighty-seven thousand, ninety-one".