867129873 has 24 divisors (see below), whose sum is σ = 1206307872. Its totient is φ = 553757568.

The previous prime is 867129859. The next prime is 867129917. The reversal of 867129873 is 378921768.

It is not a de Polignac number, because 867129873 - 2¹⁰ = 867128849 is a prime.

It is a super-2 number, since 2×867129873² = 1503828433297992258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (867129853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361165 + ... + 363557.

It is an arithmetic number, because the mean of its divisors is an integer number (50262828).

Almost surely, 2^867129873 is an apocalyptic number.

It is an amenable number.

867129873 is a deficient number, since it is larger than the sum of its proper divisors (339177999).

867129873 is a wasteful number, since it uses less digits than its factorization.

867129873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545 (or 2492 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 51.

The square root of 867129873 is about 29447.0690052508. The cubic root of 867129873 is about 953.5893294159.

The spelling of 867129873 in words is "eight hundred sixty-seven million, one hundred twenty-nine thousand, eight hundred seventy-three".