634747451 has 8 divisors (see below), whose sum is σ = 696472560. Its totient is φ = 574864992.

The previous prime is 634747387. The next prime is 634747493. The reversal of 634747451 is 154747436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 634747451 - 2⁶ = 634747387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634747399 and 634747408.

It is not an unprimeable number, because it can be changed into a prime (634747051) 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, 459941 + ... + 461318.

It is an arithmetic number, because the mean of its divisors is an integer number (87059070).

Almost surely, 2^634747451 is an apocalyptic number.

634747451 is a deficient number, since it is larger than the sum of its proper divisors (61725109).

634747451 is a wasteful number, since it uses less digits than its factorization.

634747451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921325.

The product of its digits is 282240, while the sum is 41.

The square root of 634747451 is about 25194.1947876887. The cubic root of 634747451 is about 859.4098398323.

The spelling of 634747451 in words is "six hundred thirty-four million, seven hundred forty-seven thousand, four hundred fifty-one".