64735897 has 4 divisors (see below), whose sum is σ = 64752436. Its totient is φ = 64719360.

The previous prime is 64735871. The next prime is 64735901. The reversal of 64735897 is 79853746.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28987456 + 35748441 = 5384^2 + 5979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64735897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64735897.

It is not an unprimeable number, because it can be changed into a prime (64735807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273 + ... + 11449.

It is an arithmetic number, because the mean of its divisors is an integer number (16188109).

It is a Poulet number, since it divides 2^64735896-1.

Almost surely, 2^64735897 is an apocalyptic number.

It is an amenable number.

64735897 is a deficient number, since it is larger than the sum of its proper divisors (16539).

64735897 is a wasteful number, since it uses less digits than its factorization.

64735897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16538.

The product of its digits is 1270080, while the sum is 49.

The square root of 64735897 is about 8045.8621042123. The cubic root of 64735897 is about 401.5272798686.

The spelling of 64735897 in words is "sixty-four million, seven hundred thirty-five thousand, eight hundred ninety-seven".