634450749 has 4 divisors (see below), whose sum is σ = 845934336. Its totient is φ = 422967164.

The previous prime is 634450723. The next prime is 634450753. The reversal of 634450749 is 947054436.

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 634450749 - 2⁹ = 634450237 is a prime.

It is a super-2 number, since 2×634450749² = 805055505813322002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 634450749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634450759) 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 3 ways as a sum of consecutive naturals, for example, 105741789 + ... + 105741794.

It is an arithmetic number, because the mean of its divisors is an integer number (211483584).

Almost surely, 2^634450749 is an apocalyptic number.

It is an amenable number.

634450749 is a deficient number, since it is larger than the sum of its proper divisors (211483587).

634450749 is a wasteful number, since it uses less digits than its factorization.

634450749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211483586.

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 634450749 is about 25188.3057985248. The cubic root of 634450749 is about 859.2759134136.

The spelling of 634450749 in words is "six hundred thirty-four million, four hundred fifty thousand, seven hundred forty-nine".