638122297 has 8 divisors (see below), whose sum is σ = 644846400. Its totient is φ = 631414224.

The previous prime is 638122283. The next prime is 638122339. The reversal of 638122297 is 792221836.

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 638122297 - 2⁷ = 638122169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638122207) 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, 86604 + ... + 93682.

It is an arithmetic number, because the mean of its divisors is an integer number (80605800).

Almost surely, 2^638122297 is an apocalyptic number.

It is an amenable number.

638122297 is a deficient number, since it is larger than the sum of its proper divisors (6724103).

638122297 is a wasteful number, since it uses less digits than its factorization.

638122297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8015.

The product of its digits is 72576, while the sum is 40.

The square root of 638122297 is about 25261.0826569251. The cubic root of 638122297 is about 860.9302611770.

The spelling of 638122297 in words is "six hundred thirty-eight million, one hundred twenty-two thousand, two hundred ninety-seven".