630149 has 4 divisors (see below), whose sum is σ = 678636. Its totient is φ = 581664.

The previous prime is 630127. The next prime is 630151. The reversal of 630149 is 941036.

630149 = 143² + 144² + ... + 168².

630149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37249 + 592900 = 193^2 + 770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630149 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630169) 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, 24224 + ... + 24249.

It is an arithmetic number, because the mean of its divisors is an integer number (169659).

2⁶³⁰¹⁴⁹ is an apocalyptic number.

It is an amenable number.

630149 is a deficient number, since it is larger than the sum of its proper divisors (48487).

630149 is a wasteful number, since it uses less digits than its factorization.

630149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48486.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 630149 is about 793.8192489478. The cubic root of 630149 is about 85.7329465984.

The spelling of 630149 in words is "six hundred thirty thousand, one hundred forty-nine".