343451389 has 2 divisors, whose sum is σ = 343451390. Its totient is φ = 343451388.

The previous prime is 343451333. The next prime is 343451441. The reversal of 343451389 is 983154343.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341325625 + 2125764 = 18475^2 + 1458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343451389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343451189) 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, 171725694 + 171725695.

It is an arithmetic number, because the mean of its divisors is an integer number (171725695).

Almost surely, 2^343451389 is an apocalyptic number.

It is an amenable number.

343451389 is a deficient number, since it is larger than the sum of its proper divisors (1).

343451389 is an equidigital number, since it uses as much as digits as its factorization.

343451389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 343451389 is about 18532.4415283038. The cubic root of 343451389 is about 700.3069327448.

The spelling of 343451389 in words is "three hundred forty-three million, four hundred fifty-one thousand, three hundred eighty-nine".