863161990 has 8 divisors (see below), whose sum is σ = 1553691600. Its totient is φ = 345264792.

The previous prime is 863161987. The next prime is 863161993. The reversal of 863161990 is 99161368.

It is an interprime number because it is at equal distance from previous prime (863161987) and next prime (863161993).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863161993) 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, 43158090 + ... + 43158109.

It is an arithmetic number, because the mean of its divisors is an integer number (194211450).

Almost surely, 2^863161990 is an apocalyptic number.

863161990 is a deficient number, since it is larger than the sum of its proper divisors (690529610).

863161990 is a wasteful number, since it uses less digits than its factorization.

863161990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86316206.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 863161990 is about 29379.6186156322. The cubic root of 863161990 is about 952.1326014892.

The spelling of 863161990 in words is "eight hundred sixty-three million, one hundred sixty-one thousand, nine hundred ninety".