64610389 has 4 divisors (see below), whose sum is σ = 64715724. Its totient is φ = 64505056.

The previous prime is 64610327. The next prime is 64610401. The reversal of 64610389 is 98301646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98301646 = 2 ⋅49150823.

It can be written as a sum of positive squares in 2 ways, for example, as 3301489 + 61308900 = 1817^2 + 7830^2 .

It is a cyclic number.

It is not a de Polignac number, because 64610389 - 2¹⁵ = 64577621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64610989) 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, 51742 + ... + 52975.

It is an arithmetic number, because the mean of its divisors is an integer number (16178931).

Almost surely, 2^64610389 is an apocalyptic number.

It is an amenable number.

64610389 is a deficient number, since it is larger than the sum of its proper divisors (105335).

64610389 is a wasteful number, since it uses less digits than its factorization.

64610389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105334.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 64610389 is about 8038.0587830645. The cubic root of 64610389 is about 401.2676223405.

The spelling of 64610389 in words is "sixty-four million, six hundred ten thousand, three hundred eighty-nine".