170315923 has 2 divisors, whose sum is σ = 170315924. Its totient is φ = 170315922.

The previous prime is 170315881. The next prime is 170315933. The reversal of 170315923 is 329513071.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170315923 is a prime.

It is not a weakly prime, because it can be changed into another prime (170315933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85157961 + 85157962.

It is an arithmetic number, because the mean of its divisors is an integer number (85157962).

Almost surely, 2^170315923 is an apocalyptic number.

170315923 is a deficient number, since it is larger than the sum of its proper divisors (1).

170315923 is an equidigital number, since it uses as much as digits as its factorization.

170315923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 170315923 is about 13050.5142810542. The cubic root of 170315923 is about 554.3087712555.

Adding to 170315923 its reverse (329513071), we get a palindrome (499828994).

The spelling of 170315923 in words is "one hundred seventy million, three hundred fifteen thousand, nine hundred twenty-three".