861435493 has 8 divisors (see below), whose sum is σ = 873921312. Its totient is φ = 849032016.

The previous prime is 861435439. The next prime is 861435569. The reversal of 861435493 is 394534168.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861435493 is a prime.

It is a super-2 number, since 2×861435493² = 1484142217200306098, 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 (861435593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646 + ... + 41512.

It is an arithmetic number, because the mean of its divisors is an integer number (109240164).

Almost surely, 2^861435493 is an apocalyptic number.

It is an amenable number.

861435493 is a deficient number, since it is larger than the sum of its proper divisors (12485819).

861435493 is a wasteful number, since it uses less digits than its factorization.

861435493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41171.

The product of its digits is 311040, while the sum is 43.

The square root of 861435493 is about 29350.2213449916. The cubic root of 861435493 is about 951.4973590777.

It can be divided in two parts, 861 and 435493, that multiplied together give a palindrome (374959473).

The spelling of 861435493 in words is "eight hundred sixty-one million, four hundred thirty-five thousand, four hundred ninety-three".