345047831 has 2 divisors, whose sum is σ = 345047832. Its totient is φ = 345047830.

The previous prime is 345047819. The next prime is 345047839. The reversal of 345047831 is 138740543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345047831 - 2⁶ = 345047767 is a prime.

It is a super-2 number, since 2×345047831² = 238116011355609122, 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 = 345047791 and 345047800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345047839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172523915 + 172523916.

It is an arithmetic number, because the mean of its divisors is an integer number (172523916).

Almost surely, 2^345047831 is an apocalyptic number.

345047831 is a deficient number, since it is larger than the sum of its proper divisors (1).

345047831 is an equidigital number, since it uses as much as digits as its factorization.

345047831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 345047831 is about 18575.4631436204. The cubic root of 345047831 is about 701.3903190745.

The spelling of 345047831 in words is "three hundred forty-five million, forty-seven thousand, eight hundred thirty-one".