170742431 has 2 divisors, whose sum is σ = 170742432. Its totient is φ = 170742430.

The previous prime is 170742427. The next prime is 170742437. The reversal of 170742431 is 134247071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 170742431 - 2² = 170742427 is a prime.

It is a super-2 number, since 2×170742431² = 58305955487579522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 170742394 and 170742403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170742437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85371215 + 85371216.

It is an arithmetic number, because the mean of its divisors is an integer number (85371216).

Almost surely, 2^170742431 is an apocalyptic number.

170742431 is a deficient number, since it is larger than the sum of its proper divisors (1).

170742431 is an equidigital number, since it uses as much as digits as its factorization.

170742431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 170742431 is about 13066.8447224263. The cubic root of 170742431 is about 554.7710886728.

The spelling of 170742431 in words is "one hundred seventy million, seven hundred forty-two thousand, four hundred thirty-one".