170398427 has 4 divisors (see below), whose sum is σ = 170448216. Its totient is φ = 170348640.

The previous prime is 170398387. The next prime is 170398433. The reversal of 170398427 is 724893071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724893071 = 7 ⋅103556153.

It is a cyclic number.

It is not a de Polignac number, because 170398427 - 2⁶ = 170398363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170398447) 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, 19349 + ... + 26742.

It is an arithmetic number, because the mean of its divisors is an integer number (42612054).

Almost surely, 2^170398427 is an apocalyptic number.

170398427 is a deficient number, since it is larger than the sum of its proper divisors (49789).

170398427 is an equidigital number, since it uses as much as digits as its factorization.

170398427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49788.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 170398427 is about 13053.6748465710. The cubic root of 170398427 is about 554.3982624150.

The spelling of 170398427 in words is "one hundred seventy million, three hundred ninety-eight thousand, four hundred twenty-seven".