378744397 has 2 divisors, whose sum is σ = 378744398. Its totient is φ = 378744396.

The previous prime is 378744349. The next prime is 378744403. The reversal of 378744397 is 793447873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337861161 + 40883236 = 18381^2 + 6394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378744397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378744337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189372198 + 189372199.

It is an arithmetic number, because the mean of its divisors is an integer number (189372199).

Almost surely, 2^378744397 is an apocalyptic number.

It is an amenable number.

378744397 is a deficient number, since it is larger than the sum of its proper divisors (1).

378744397 is an equidigital number, since it uses as much as digits as its factorization.

378744397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 52.

The square root of 378744397 is about 19461.3565046222. The cubic root of 378744397 is about 723.5169983654.

It can be divided in two parts, 3787 and 44397, that added together give a palindrome (48184).

The spelling of 378744397 in words is "three hundred seventy-eight million, seven hundred forty-four thousand, three hundred ninety-seven".