630861861 has 8 divisors (see below), whose sum is σ = 961313344. Its totient is φ = 360492480.

The previous prime is 630861859. The next prime is 630861863. The reversal of 630861861 is 168168036.

It is an interprime number because it is at equal distance from previous prime (630861859) and next prime (630861863).

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

It is not a de Polignac number, because 630861861 - 2¹ = 630861859 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 (630861863) 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, 15020500 + ... + 15020541.

It is an arithmetic number, because the mean of its divisors is an integer number (120164168).

Almost surely, 2^630861861 is an apocalyptic number.

It is an amenable number.

630861861 is a deficient number, since it is larger than the sum of its proper divisors (330451483).

630861861 is a wasteful number, since it uses less digits than its factorization.

630861861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30041051.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 630861861 is about 25116.9636102774. The cubic root of 630861861 is about 857.6526310486.

The spelling of 630861861 in words is "six hundred thirty million, eight hundred sixty-one thousand, eight hundred sixty-one".