851163389 has 4 divisors (see below), whose sum is σ = 855573756. Its totient is φ = 846753024.

The previous prime is 851163359. The next prime is 851163409. The reversal of 851163389 is 983361158.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 464057764 + 387105625 = 21542^2 + 19675^2 .

It is a cyclic number.

It is not a de Polignac number, because 851163389 - 2¹² = 851159293 is a prime.

It is a super-2 number, since 2×851163389² = 1448958229547930642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851163329) 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, 2204894 + ... + 2205279.

It is an arithmetic number, because the mean of its divisors is an integer number (213893439).

Almost surely, 2^851163389 is an apocalyptic number.

It is an amenable number.

851163389 is a deficient number, since it is larger than the sum of its proper divisors (4410367).

851163389 is a wasteful number, since it uses less digits than its factorization.

851163389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410366.

The product of its digits is 155520, while the sum is 44.

The square root of 851163389 is about 29174.7046086160. The cubic root of 851163389 is about 947.7002132815.

The spelling of 851163389 in words is "eight hundred fifty-one million, one hundred sixty-three thousand, three hundred eighty-nine".