53946987 has 4 divisors (see below), whose sum is σ = 71929320. Its totient is φ = 35964656.

The previous prime is 53946973. The next prime is 53947027. The reversal of 53946987 is 78964935.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53946987 - 2¹² = 53942891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53946917) 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, 8991162 + ... + 8991167.

It is an arithmetic number, because the mean of its divisors is an integer number (17982330).

Almost surely, 2^53946987 is an apocalyptic number.

53946987 is a deficient number, since it is larger than the sum of its proper divisors (17982333).

53946987 is a wasteful number, since it uses less digits than its factorization.

53946987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17982332.

The product of its digits is 1632960, while the sum is 51.

The square root of 53946987 is about 7344.8612648572. The cubic root of 53946987 is about 377.8525852209.

The spelling of 53946987 in words is "fifty-three million, nine hundred forty-six thousand, nine hundred eighty-seven".