53863987 has 2 divisors, whose sum is σ = 53863988. Its totient is φ = 53863986.

The previous prime is 53863981. The next prime is 53864023. The reversal of 53863987 is 78936835.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53863987 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53863987.

It is not a weakly prime, because it can be changed into another prime (53863981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26931993 + 26931994.

It is an arithmetic number, because the mean of its divisors is an integer number (26931994).

Almost surely, 2^53863987 is an apocalyptic number.

53863987 is a deficient number, since it is larger than the sum of its proper divisors (1).

53863987 is an equidigital number, since it uses as much as digits as its factorization.

53863987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 53863987 is about 7339.2088810716. The cubic root of 53863987 is about 377.6587043764.

The spelling of 53863987 in words is "fifty-three million, eight hundred sixty-three thousand, nine hundred eighty-seven".