860172829 has 2 divisors, whose sum is σ = 860172830. Its totient is φ = 860172828.

The previous prime is 860172827. The next prime is 860172847. The reversal of 860172829 is 928271068.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449016100 + 411156729 = 21190^2 + 20277^2 .

It is a cyclic number.

It is not a de Polignac number, because 860172829 - 2¹ = 860172827 is a prime.

Together with 860172827, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860172823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430086414 + 430086415.

It is an arithmetic number, because the mean of its divisors is an integer number (430086415).

Almost surely, 2^860172829 is an apocalyptic number.

It is an amenable number.

860172829 is a deficient number, since it is larger than the sum of its proper divisors (1).

860172829 is an equidigital number, since it uses as much as digits as its factorization.

860172829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 860172829 is about 29328.7031591920. The cubic root of 860172829 is about 951.0322405048.

The spelling of 860172829 in words is "eight hundred sixty million, one hundred seventy-two thousand, eight hundred twenty-nine".