345826381 has 2 divisors, whose sum is σ = 345826382. Its totient is φ = 345826380.

The previous prime is 345826373. The next prime is 345826409. The reversal of 345826381 is 183628543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286997481 + 58828900 = 16941^2 + 7670^2 .

It is a cyclic number.

It is not a de Polignac number, because 345826381 - 2³ = 345826373 is a prime.

It is a super-2 number, since 2×345826381² = 239191771591114322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345820381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172913190 + 172913191.

It is an arithmetic number, because the mean of its divisors is an integer number (172913191).

Almost surely, 2^345826381 is an apocalyptic number.

It is an amenable number.

345826381 is a deficient number, since it is larger than the sum of its proper divisors (1).

345826381 is an equidigital number, since it uses as much as digits as its factorization.

345826381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 40.

The square root of 345826381 is about 18596.4077445081. The cubic root of 345826381 is about 701.9174510553.

The spelling of 345826381 in words is "three hundred forty-five million, eight hundred twenty-six thousand, three hundred eighty-one".