863626945 has 8 divisors (see below), whose sum is σ = 1097314344. Its totient is φ = 650260224.

The previous prime is 863626913. The next prime is 863626957. The reversal of 863626945 is 549626368.

It can be written as a sum of positive squares in 4 ways, for example, as 296425089 + 567201856 = 17217^2 + 23816^2 .

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 863626945 - 2⁵ = 863626913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5080074 + ... + 5080243.

It is an arithmetic number, because the mean of its divisors is an integer number (137164293).

Almost surely, 2^863626945 is an apocalyptic number.

863626945 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

863626945 is a deficient number, since it is larger than the sum of its proper divisors (233687399).

863626945 is a wasteful number, since it uses less digits than its factorization.

863626945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160339.

The product of its digits is 1866240, while the sum is 49.

The square root of 863626945 is about 29387.5304338422. The cubic root of 863626945 is about 952.3035309145.

The spelling of 863626945 in words is "eight hundred sixty-three million, six hundred twenty-six thousand, nine hundred forty-five".