345391129 has 2 divisors, whose sum is σ = 345391130. Its totient is φ = 345391128.

The previous prime is 345391121. The next prime is 345391141. The reversal of 345391129 is 921193543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294053904 + 51337225 = 17148^2 + 7165^2 .

It is a cyclic number.

It is not a de Polignac number, because 345391129 - 2³ = 345391121 is a prime.

It is not a weakly prime, because it can be changed into another prime (345391121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172695564 + 172695565.

It is an arithmetic number, because the mean of its divisors is an integer number (172695565).

Almost surely, 2^345391129 is an apocalyptic number.

It is an amenable number.

345391129 is a deficient number, since it is larger than the sum of its proper divisors (1).

345391129 is an equidigital number, since it uses as much as digits as its factorization.

345391129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 345391129 is about 18584.7014772904. The cubic root of 345391129 is about 701.6228530996.

The spelling of 345391129 in words is "three hundred forty-five million, three hundred ninety-one thousand, one hundred twenty-nine".