861880753 has 4 divisors (see below), whose sum is σ = 878142708. Its totient is φ = 845618800.

The previous prime is 861880751. The next prime is 861880763. The reversal of 861880753 is 357088168.

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 699496704 + 162384049 = 26448^2 + 12743^2 .

It is a cyclic number.

It is not a de Polignac number, because 861880753 - 2¹ = 861880751 is a prime.

It is a super-3 number, since 3×861880753³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861880751) 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, 8130898 + ... + 8131003.

It is an arithmetic number, because the mean of its divisors is an integer number (219535677).

Almost surely, 2^861880753 is an apocalyptic number.

It is an amenable number.

861880753 is a deficient number, since it is larger than the sum of its proper divisors (16261955).

861880753 is a wasteful number, since it uses less digits than its factorization.

861880753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16261954.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 861880753 is about 29357.8056570991. The cubic root of 861880753 is about 951.6612679421.

The spelling of 861880753 in words is "eight hundred sixty-one million, eight hundred eighty thousand, seven hundred fifty-three".