64787291 has 8 divisors (see below), whose sum is σ = 66308160. Its totient is φ = 63272448.

The previous prime is 64787279. The next prime is 64787299. The reversal of 64787291 is 19278746.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64787291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64787299) 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, 25925 + ... + 28313.

It is an arithmetic number, because the mean of its divisors is an integer number (8288520).

Almost surely, 2^64787291 is an apocalyptic number.

64787291 is a deficient number, since it is larger than the sum of its proper divisors (1520869).

64787291 is a wasteful number, since it uses less digits than its factorization.

64787291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013.

The product of its digits is 169344, while the sum is 44.

The square root of 64787291 is about 8049.0552861811. The cubic root of 64787291 is about 401.6335096184.

The spelling of 64787291 in words is "sixty-four million, seven hundred eighty-seven thousand, two hundred ninety-one".