64797987 has 8 divisors (see below), whose sum is σ = 86434560. Its totient is φ = 43180040.

The previous prime is 64797983. The next prime is 64798001. The reversal of 64797987 is 78979746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64797987 - 2² = 64797983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64797983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10714 + ... + 15632.

It is an arithmetic number, because the mean of its divisors is an integer number (10804320).

Almost surely, 2^64797987 is an apocalyptic number.

64797987 is a deficient number, since it is larger than the sum of its proper divisors (21636573).

64797987 is a wasteful number, since it uses less digits than its factorization.

64797987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9313.

The product of its digits is 5334336, while the sum is 57.

The square root of 64797987 is about 8049.7196845605. The cubic root of 64797987 is about 401.6556108441.

The spelling of 64797987 in words is "sixty-four million, seven hundred ninety-seven thousand, nine hundred eighty-seven".