379434866785409 has 2 divisors, whose sum is σ = 379434866785410. Its totient is φ = 379434866785408.

The previous prime is 379434866785391. The next prime is 379434866785411. The reversal of 379434866785409 is 904587668434973.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251066306685184 + 128368560100225 = 15845072^2 + 11329985^2 .

It is a cyclic number.

It is not a de Polignac number, because 379434866785409 - 2¹⁶ = 379434866719873 is a prime.

It is a super-2 number, since 2×379434866785409² (a number of 30 digits) contains 22 as substring.

Together with 379434866785411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (379434866785489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189717433392704 + 189717433392705.

It is an arithmetic number, because the mean of its divisors is an integer number (189717433392705).

Almost surely, 2^{379434866785409} is an apocalyptic number.

It is an amenable number.

379434866785409 is a deficient number, since it is larger than the sum of its proper divisors (1).

379434866785409 is an equidigital number, since it uses as much as digits as its factorization.

379434866785409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26336378880, while the sum is 83.

The spelling of 379434866785409 in words is "three hundred seventy-nine trillion, four hundred thirty-four billion, eight hundred sixty-six million, seven hundred eighty-five thousand, four hundred nine".