378385769 has 2 divisors, whose sum is σ = 378385770. Its totient is φ = 378385768.

The previous prime is 378385759. The next prime is 378385781. The reversal of 378385769 is 967583873.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 355699600 + 22686169 = 18860^2 + 4763^2 .

It is a cyclic number.

It is not a de Polignac number, because 378385769 - 2⁴ = 378385753 is a prime.

It is a super-2 number, since 2×378385769² = 286351580363442722, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (378385759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189192884 + 189192885.

It is an arithmetic number, because the mean of its divisors is an integer number (189192885).

Almost surely, 2^378385769 is an apocalyptic number.

It is an amenable number.

378385769 is a deficient number, since it is larger than the sum of its proper divisors (1).

378385769 is an equidigital number, since it uses as much as digits as its factorization.

378385769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 56.

The square root of 378385769 is about 19452.1404734800. The cubic root of 378385769 is about 723.2885633957.

The spelling of 378385769 in words is "three hundred seventy-eight million, three hundred eighty-five thousand, seven hundred sixty-nine".