171428077 has 4 divisors (see below), whose sum is σ = 177339420. Its totient is φ = 165516736.

The previous prime is 171428071. The next prime is 171428083. The reversal of 171428077 is 770824171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 770824171 = 13 ⋅59294167.

It is an interprime number because it is at equal distance from previous prime (171428071) and next prime (171428083).

It can be written as a sum of positive squares in 2 ways, for example, as 141276996 + 30151081 = 11886^2 + 5491^2 .

It is a cyclic number.

It is not a de Polignac number, because 171428077 - 2³ = 171428069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171428071) 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, 2955628 + ... + 2955685.

It is an arithmetic number, because the mean of its divisors is an integer number (44334855).

Almost surely, 2^171428077 is an apocalyptic number.

It is an amenable number.

171428077 is a deficient number, since it is larger than the sum of its proper divisors (5911343).

171428077 is an equidigital number, since it uses as much as digits as its factorization.

171428077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5911342.

The product of its (nonzero) digits is 21952, while the sum is 37.

The square root of 171428077 is about 13093.0545328430. The cubic root of 171428077 is about 555.5126902231.

It can be divided in two parts, 1714 and 28077, that added together give a cube (29791 = 31³).

The spelling of 171428077 in words is "one hundred seventy-one million, four hundred twenty-eight thousand, seventy-seven".