64970897 has 4 divisors (see below), whose sum is σ = 64987956. Its totient is φ = 64953840.

The previous prime is 64970879. The next prime is 64970903. The reversal of 64970897 is 79807946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79807946 = 2 ⋅39903973.

It can be written as a sum of positive squares in 2 ways, for example, as 51251281 + 13719616 = 7159^2 + 3704^2 .

It is a cyclic number.

It is not a de Polignac number, because 64970897 - 2⁸ = 64970641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64970197) 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, 83 + ... + 11399.

It is an arithmetic number, because the mean of its divisors is an integer number (16246989).

Almost surely, 2^64970897 is an apocalyptic number.

It is an amenable number.

64970897 is a deficient number, since it is larger than the sum of its proper divisors (17059).

64970897 is a wasteful number, since it uses less digits than its factorization.

64970897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17058.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 64970897 is about 8060.4526547831. The cubic root of 64970897 is about 402.0125591152.

The spelling of 64970897 in words is "sixty-four million, nine hundred seventy thousand, eight hundred ninety-seven".