634873489 has 4 divisors (see below), whose sum is σ = 636307056. Its totient is φ = 633439924.

The previous prime is 634873387. The next prime is 634873513. The reversal of 634873489 is 984378436.

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 634873489 - 2¹⁵ = 634840721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634823489) 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, 716119 + ... + 717004.

It is an arithmetic number, because the mean of its divisors is an integer number (159076764).

Almost surely, 2^634873489 is an apocalyptic number.

It is an amenable number.

634873489 is a deficient number, since it is larger than the sum of its proper divisors (1433567).

634873489 is a wasteful number, since it uses less digits than its factorization.

634873489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433566.

The product of its digits is 3483648, while the sum is 52.

The square root of 634873489 is about 25196.6959937211. The cubic root of 634873489 is about 859.4667186895.

The spelling of 634873489 in words is "six hundred thirty-four million, eight hundred seventy-three thousand, four hundred eighty-nine".