639614027 has 4 divisors (see below), whose sum is σ = 688815120. Its totient is φ = 590412936.

The previous prime is 639613993. The next prime is 639614047. The reversal of 639614027 is 720416936.

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

It is a cyclic number.

It is not a de Polignac number, because 639614027 - 2⁶ = 639613963 is a prime.

It is a super-2 number, since 2×639614027² = 818212207070313458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639614047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24600527 + ... + 24600552.

It is an arithmetic number, because the mean of its divisors is an integer number (172203780).

Almost surely, 2^639614027 is an apocalyptic number.

639614027 is a deficient number, since it is larger than the sum of its proper divisors (49201093).

639614027 is a wasteful number, since it uses less digits than its factorization.

639614027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49201092.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 639614027 is about 25290.5916696308. The cubic root of 639614027 is about 861.6006008374.

The spelling of 639614027 in words is "six hundred thirty-nine million, six hundred fourteen thousand, twenty-seven".