345856631 has 2 divisors, whose sum is σ = 345856632. Its totient is φ = 345856630.

The previous prime is 345856559. The next prime is 345856657. The reversal of 345856631 is 136658543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345856631 - 2¹⁰ = 345855607 is a prime.

It is a super-2 number, since 2×345856631² = 239233618413340322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345856331) 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, 172928315 + 172928316.

It is an arithmetic number, because the mean of its divisors is an integer number (172928316).

Almost surely, 2^345856631 is an apocalyptic number.

345856631 is a deficient number, since it is larger than the sum of its proper divisors (1).

345856631 is an equidigital number, since it uses as much as digits as its factorization.

345856631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 41.

The square root of 345856631 is about 18597.2210558460. The cubic root of 345856631 is about 701.9379164150.

The spelling of 345856631 in words is "three hundred forty-five million, eight hundred fifty-six thousand, six hundred thirty-one".