634149 has 10 divisors (see below), whose sum is σ = 947430. Its totient is φ = 422712.

The previous prime is 634141. The next prime is 634157. The reversal of 634149 is 941436.

634149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (634141) and next prime (634157).

It can be written as a sum of positive squares in only one way, i.e., 431649 + 202500 = 657^2 + 450^2 .

It is not a de Polignac number, because 634149 - 2³ = 634141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634141) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3834 + ... + 3995.

It is an arithmetic number, because the mean of its divisors is an integer number (94743).

2⁶³⁴¹⁴⁹ is an apocalyptic number.

It is an amenable number.

634149 is a deficient number, since it is larger than the sum of its proper divisors (313281).

634149 is an equidigital number, since it uses as much as digits as its factorization.

634149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841 (or 7832 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 634149 is about 796.3347286161. The cubic root of 634149 is about 85.9139666030.

The spelling of 634149 in words is "six hundred thirty-four thousand, one hundred forty-nine".