630920279 has 8 divisors (see below), whose sum is σ = 690323088. Its totient is φ = 571858560.

The previous prime is 630920243. The next prime is 630920309. The reversal of 630920279 is 972029036.

630920279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 630920279 - 2¹² = 630916183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630920219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81392 + ... + 88805.

It is an arithmetic number, because the mean of its divisors is an integer number (86290386).

Almost surely, 2^630920279 is an apocalyptic number.

630920279 is a deficient number, since it is larger than the sum of its proper divisors (59402809).

630920279 is a wasteful number, since it uses less digits than its factorization.

630920279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170545.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 630920279 is about 25118.1265025877. The cubic root of 630920279 is about 857.6791031962.

The spelling of 630920279 in words is "six hundred thirty million, nine hundred twenty thousand, two hundred seventy-nine".