64130439 has 4 divisors (see below), whose sum is σ = 85507256. Its totient is φ = 42753624.

The previous prime is 64130431. The next prime is 64130447. The reversal of 64130439 is 93403146.

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

It is an interprime number because it is at equal distance from previous prime (64130431) and next prime (64130447).

It is not a de Polignac number, because 64130439 - 2³ = 64130431 is a prime.

It is a super-3 number, since 3×64130439³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64130431) 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, 10688404 + ... + 10688409.

It is an arithmetic number, because the mean of its divisors is an integer number (21376814).

Almost surely, 2^64130439 is an apocalyptic number.

64130439 is a deficient number, since it is larger than the sum of its proper divisors (21376817).

64130439 is a wasteful number, since it uses less digits than its factorization.

64130439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21376816.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 64130439 is about 8008.1482878378. The cubic root of 64130439 is about 400.2715635081.

The spelling of 64130439 in words is "sixty-four million, one hundred thirty thousand, four hundred thirty-nine".