64904897 has 8 divisors (see below), whose sum is σ = 66134400. Its totient is φ = 63679824.

The previous prime is 64904891. The next prime is 64904909. The reversal of 64904897 is 79840946.

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 64904897 - 2⁴ = 64904881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64904891) 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, 48248 + ... + 49574.

It is an arithmetic number, because the mean of its divisors is an integer number (8266800).

Almost surely, 2^64904897 is an apocalyptic number.

It is an amenable number.

64904897 is a deficient number, since it is larger than the sum of its proper divisors (1229503).

64904897 is a wasteful number, since it uses less digits than its factorization.

64904897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 64904897 is about 8056.3575516483. The cubic root of 64904897 is about 401.8763862565.

The spelling of 64904897 in words is "sixty-four million, nine hundred four thousand, eight hundred ninety-seven".