53387987 has 2 divisors, whose sum is σ = 53387988. Its totient is φ = 53387986.

The previous prime is 53387981. The next prime is 53388001. The reversal of 53387987 is 78978335.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53387987 - 2⁸ = 53387731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53387981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26693993 + 26693994.

It is an arithmetic number, because the mean of its divisors is an integer number (26693994).

Almost surely, 2^53387987 is an apocalyptic number.

53387987 is a deficient number, since it is larger than the sum of its proper divisors (1).

53387987 is an equidigital number, since it uses as much as digits as its factorization.

53387987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 53387987 is about 7306.7083560246. The cubic root of 53387987 is about 376.5429453307.

The spelling of 53387987 in words is "fifty-three million, three hundred eighty-seven thousand, nine hundred eighty-seven".