861093399 has 8 divisors (see below), whose sum is σ = 1149612912. Its totient is φ = 573318080.

The previous prime is 861093371. The next prime is 861093407. The reversal of 861093399 is 993390168.

It is a happy number.

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 861093399 - 2¹⁹ = 860569111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861093199) by changing a digit.

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, 183342 + ... + 187979.

It is an arithmetic number, because the mean of its divisors is an integer number (143701614).

Almost surely, 2^861093399 is an apocalyptic number.

861093399 is a deficient number, since it is larger than the sum of its proper divisors (288519513).

861093399 is a wasteful number, since it uses less digits than its factorization.

861093399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372097.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 861093399 is about 29344.3929737863. The cubic root of 861093399 is about 951.3713892527.

The spelling of 861093399 in words is "eight hundred sixty-one million, ninety-three thousand, three hundred ninety-nine".