861603922 has 8 divisors (see below), whose sum is σ = 1292976396. Its totient is φ = 430611792.

The previous prime is 861603901. The next prime is 861603937. The reversal of 861603922 is 229306168.

It can be written as a sum of positive squares in 2 ways, for example, as 834574321 + 27029601 = 28889^2 + 5199^2 .

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

It is a super-2 number, since 2×861603922² = 1484722636811564168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89353 + ... + 98524.

Almost surely, 2^861603922 is an apocalyptic number.

861603922 is a deficient number, since it is larger than the sum of its proper divisors (431372474).

861603922 is a wasteful number, since it uses less digits than its factorization.

861603922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190172.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 861603922 is about 29353.0905016831. The cubic root of 861603922 is about 951.5593677080.

The spelling of 861603922 in words is "eight hundred sixty-one million, six hundred three thousand, nine hundred twenty-two".