860433921 has 10 divisors (see below), whose sum is σ = 1285339682. Its totient is φ = 573622560.

The previous prime is 860433919. The next prime is 860433949. The reversal of 860433921 is 129334068.

It can be written as a sum of positive squares in only one way, i.e., 439363521 + 421070400 = 20961^2 + 20520^2 .

It is not a de Polignac number, because 860433921 - 2¹ = 860433919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (860413921) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5311240 + ... + 5311401.

Almost surely, 2^860433921 is an apocalyptic number.

860433921 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

860433921 is a deficient number, since it is larger than the sum of its proper divisors (424905761).

860433921 is a wasteful number, since it uses less digits than its factorization.

860433921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10622653 (or 10622644 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 860433921 is about 29333.1539558909. The cubic root of 860433921 is about 951.1284544215.

Adding to 860433921 its reverse (129334068), we get a palindrome (989767989).

The spelling of 860433921 in words is "eight hundred sixty million, four hundred thirty-three thousand, nine hundred twenty-one".