639046499 has 16 divisors (see below), whose sum is σ = 807780288. Its totient is φ = 491951232.

The previous prime is 639046487. The next prime is 639046561. The reversal of 639046499 is 994640936.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 639046499 - 2⁴ = 639046483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (639046699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91532 + ... + 98265.

It is an arithmetic number, because the mean of its divisors is an integer number (50486268).

Almost surely, 2^639046499 is an apocalyptic number.

639046499 is a deficient number, since it is larger than the sum of its proper divisors (168733789).

639046499 is a wasteful number, since it uses less digits than its factorization.

639046499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189854.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The square root of 639046499 is about 25279.3690388032. The cubic root of 639046499 is about 861.3456933771.

The spelling of 639046499 in words is "six hundred thirty-nine million, forty-six thousand, four hundred ninety-nine".