378561269 has 2 divisors, whose sum is σ = 378561270. Its totient is φ = 378561268.

The previous prime is 378561247. The next prime is 378561289. The reversal of 378561269 is 962165873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333537169 + 45024100 = 18263^2 + 6710^2 .

It is an emirp because it is prime and its reverse (962165873) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378561269 is a prime.

It is a super-2 number, since 2×378561269² = 286617268773780722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378561289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189280634 + 189280635.

It is an arithmetic number, because the mean of its divisors is an integer number (189280635).

Almost surely, 2^378561269 is an apocalyptic number.

It is an amenable number.

378561269 is a deficient number, since it is larger than the sum of its proper divisors (1).

378561269 is an equidigital number, since it uses as much as digits as its factorization.

378561269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 378561269 is about 19456.6510222083. The cubic root of 378561269 is about 723.4003695059.

The spelling of 378561269 in words is "three hundred seventy-eight million, five hundred sixty-one thousand, two hundred sixty-nine".