634334387 has 2 divisors, whose sum is σ = 634334388. Its totient is φ = 634334386.

The previous prime is 634334381. The next prime is 634334443. The reversal of 634334387 is 783433436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634334387 - 2²² = 630140083 is a prime.

It is a super-2 number, since 2×634334387² = 804760229061331538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (634334381) 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 as a sum of consecutive naturals, namely, 317167193 + 317167194.

It is an arithmetic number, because the mean of its divisors is an integer number (317167194).

Almost surely, 2^634334387 is an apocalyptic number.

634334387 is a deficient number, since it is larger than the sum of its proper divisors (1).

634334387 is an equidigital number, since it uses as much as digits as its factorization.

634334387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 41.

The square root of 634334387 is about 25185.9958508692. The cubic root of 634334387 is about 859.2233781157.

The spelling of 634334387 in words is "six hundred thirty-four million, three hundred thirty-four thousand, three hundred eighty-seven".