634221797 has 16 divisors (see below), whose sum is σ = 706294080. Its totient is φ = 564595200.

The previous prime is 634221787. The next prime is 634221811. The reversal of 634221797 is 797122436.

It is a cyclic number.

It is not a de Polignac number, because 634221797 - 2⁴ = 634221781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634221727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541022 + ... + 542192.

It is an arithmetic number, because the mean of its divisors is an integer number (44143380).

Almost surely, 2^634221797 is an apocalyptic number.

It is an amenable number.

634221797 is a deficient number, since it is larger than the sum of its proper divisors (72072283).

634221797 is a wasteful number, since it uses less digits than its factorization.

634221797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164.

The product of its digits is 127008, while the sum is 41.

The square root of 634221797 is about 25183.7605809776. The cubic root of 634221797 is about 859.1725396903.

The spelling of 634221797 in words is "six hundred thirty-four million, two hundred twenty-one thousand, seven hundred ninety-seven".