638053797 has 16 divisors (see below), whose sum is σ = 866944512. Its totient is φ = 417318000.

The previous prime is 638053771. The next prime is 638053807. The reversal of 638053797 is 797350836.

It is not a de Polignac number, because 638053797 - 2¹⁰ = 638052773 is a prime.

It is a super-3 number, since 3×638053797³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638053747) 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, 44128 + ... + 56774.

It is an arithmetic number, because the mean of its divisors is an integer number (54184032).

Almost surely, 2^638053797 is an apocalyptic number.

638053797 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

638053797 is a deficient number, since it is larger than the sum of its proper divisors (228890715).

638053797 is a wasteful number, since it uses less digits than its factorization.

638053797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12968.

The product of its (nonzero) digits is 952560, while the sum is 48.

The square root of 638053797 is about 25259.7267799951. The cubic root of 638053797 is about 860.8994542123.

The spelling of 638053797 in words is "six hundred thirty-eight million, fifty-three thousand, seven hundred ninety-seven".