64363987 has 2 divisors, whose sum is σ = 64363988. Its totient is φ = 64363986.

The previous prime is 64363969. The next prime is 64364017. The reversal of 64363987 is 78936346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64363987 - 2¹¹ = 64361939 is a prime.

It is not a weakly prime, because it can be changed into another prime (64363487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32181993 + 32181994.

It is an arithmetic number, because the mean of its divisors is an integer number (32181994).

Almost surely, 2^64363987 is an apocalyptic number.

64363987 is a deficient number, since it is larger than the sum of its proper divisors (1).

64363987 is an equidigital number, since it uses as much as digits as its factorization.

64363987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The square root of 64363987 is about 8022.7169338074. The cubic root of 64363987 is about 400.7568732041.

The spelling of 64363987 in words is "sixty-four million, three hundred sixty-three thousand, nine hundred eighty-seven".