639547354 has 8 divisors (see below), whose sum is σ = 961611840. Its totient is φ = 319010076.

The previous prime is 639547351. The next prime is 639547387. The reversal of 639547354 is 453745936.

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

It is not an unprimeable number, because it can be changed into a prime (639547351) 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, 380754 + ... + 382429.

It is an arithmetic number, because the mean of its divisors is an integer number (120201480).

Almost surely, 2^639547354 is an apocalyptic number.

639547354 is a deficient number, since it is larger than the sum of its proper divisors (322064486).

639547354 is a wasteful number, since it uses less digits than its factorization.

639547354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763604.

The product of its digits is 1360800, while the sum is 46.

The square root of 639547354 is about 25289.2734968801. The cubic root of 639547354 is about 861.5706622126.

The spelling of 639547354 in words is "six hundred thirty-nine million, five hundred forty-seven thousand, three hundred fifty-four".