639452041 has 8 divisors (see below), whose sum is σ = 649324544. Its totient is φ = 629609760.

The previous prime is 639452029. The next prime is 639452053. The reversal of 639452041 is 140254936.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (639452029) and next prime (639452053).

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 639452041 - 2¹⁹ = 638927753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 639451988 and 639452006.

It is not an unprimeable number, because it can be changed into a prime (639452941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37096 + ... + 51526.

It is an arithmetic number, because the mean of its divisors is an integer number (81165568).

Almost surely, 2^639452041 is an apocalyptic number.

It is an amenable number.

639452041 is a deficient number, since it is larger than the sum of its proper divisors (9872503).

639452041 is a wasteful number, since it uses less digits than its factorization.

639452041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15111.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 639452041 is about 25287.3889715803. The cubic root of 639452041 is about 861.5278595628.

The spelling of 639452041 in words is "six hundred thirty-nine million, four hundred fifty-two thousand, forty-one".