630651849 has 4 divisors (see below), whose sum is σ = 840869136. Its totient is φ = 420434564.

The previous prime is 630651841. The next prime is 630651863. The reversal of 630651849 is 948156036.

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 630651849 - 2³ = 630651841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 630651849.

It is not an unprimeable number, because it can be changed into a prime (630651841) 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, 105108639 + ... + 105108644.

It is an arithmetic number, because the mean of its divisors is an integer number (210217284).

Almost surely, 2^630651849 is an apocalyptic number.

It is an amenable number.

630651849 is a deficient number, since it is larger than the sum of its proper divisors (210217287).

630651849 is a wasteful number, since it uses less digits than its factorization.

630651849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210217286.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 630651849 is about 25112.7825817849. The cubic root of 630651849 is about 857.5574504995.

The spelling of 630651849 in words is "six hundred thirty million, six hundred fifty-one thousand, eight hundred forty-nine".