64430139 has 8 divisors (see below), whose sum is σ = 87527952. Its totient is φ = 42142880.

The previous prime is 64430137. The next prime is 64430167. The reversal of 64430139 is 93103446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64430139 - 2¹ = 64430137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64430137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202452 + ... + 202769.

It is an arithmetic number, because the mean of its divisors is an integer number (10940994).

Almost surely, 2^64430139 is an apocalyptic number.

64430139 is a deficient number, since it is larger than the sum of its proper divisors (23097813).

64430139 is a wasteful number, since it uses less digits than its factorization.

64430139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405277.

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

The square root of 64430139 is about 8026.8386678692. The cubic root of 64430139 is about 400.8941227886.

The spelling of 64430139 in words is "sixty-four million, four hundred thirty thousand, one hundred thirty-nine".