64880039 has 4 divisors (see below), whose sum is σ = 74148624. Its totient is φ = 55611456.

The previous prime is 64879963. The next prime is 64880059. The reversal of 64880039 is 93008846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64880039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64879984 and 64880011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64880059) 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, 4634282 + ... + 4634295.

It is an arithmetic number, because the mean of its divisors is an integer number (18537156).

Almost surely, 2^64880039 is an apocalyptic number.

64880039 is a deficient number, since it is larger than the sum of its proper divisors (9268585).

64880039 is an equidigital number, since it uses as much as digits as its factorization.

64880039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9268584.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 64880039 is about 8054.8146471536. The cubic root of 64880039 is about 401.8250746745.

The spelling of 64880039 in words is "sixty-four million, eight hundred eighty thousand, thirty-nine".