345173431 has 2 divisors, whose sum is σ = 345173432. Its totient is φ = 345173430.

The previous prime is 345173429. The next prime is 345173447. The reversal of 345173431 is 134371543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345173431 - 2¹ = 345173429 is a prime.

It is a super-2 number, since 2×345173431² = 238289394936623522, which contains 22 as substring.

Together with 345173429, it forms a pair of twin primes.

It is a plaindrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 345173393 and 345173402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345173401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172586715 + 172586716.

It is an arithmetic number, because the mean of its divisors is an integer number (172586716).

Almost surely, 2^345173431 is an apocalyptic number.

345173431 is a deficient number, since it is larger than the sum of its proper divisors (1).

345173431 is an equidigital number, since it uses as much as digits as its factorization.

345173431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 31.

The square root of 345173431 is about 18578.8436400116. The cubic root of 345173431 is about 701.4754125305.

The spelling of 345173431 in words is "three hundred forty-five million, one hundred seventy-three thousand, four hundred thirty-one".