634223153 has 4 divisors (see below), whose sum is σ = 634864128. Its totient is φ = 633582180.

The previous prime is 634223113. The next prime is 634223159. The reversal of 634223153 is 351322436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 634223153 - 2¹² = 634219057 is a prime.

It is a super-2 number, since 2×634223153² = 804478015602522818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634223159) 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, 319001 + ... + 320982.

It is an arithmetic number, because the mean of its divisors is an integer number (158716032).

Almost surely, 2^634223153 is an apocalyptic number.

It is an amenable number.

634223153 is a deficient number, since it is larger than the sum of its proper divisors (640975).

634223153 is an equidigital number, since it uses as much as digits as its factorization.

634223153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640974.

The product of its digits is 12960, while the sum is 29.

The square root of 634223153 is about 25183.7875030743. The cubic root of 634223153 is about 859.1731520088.

Adding to 634223153 its reverse (351322436), we get a palindrome (985545589).

The spelling of 634223153 in words is "six hundred thirty-four million, two hundred twenty-three thousand, one hundred fifty-three".