378313849 has 2 divisors, whose sum is σ = 378313850. Its totient is φ = 378313848.

The previous prime is 378313811. The next prime is 378313861. The reversal of 378313849 is 948313873.

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., 319515625 + 58798224 = 17875^2 + 7668^2 .

It is a cyclic number.

It is not a de Polignac number, because 378313849 - 2¹³ = 378305657 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 378313799 and 378313808.

It is not a weakly prime, because it can be changed into another prime (378313879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189156924 + 189156925.

It is an arithmetic number, because the mean of its divisors is an integer number (189156925).

Almost surely, 2^378313849 is an apocalyptic number.

It is an amenable number.

378313849 is a deficient number, since it is larger than the sum of its proper divisors (1).

378313849 is an equidigital number, since it uses as much as digits as its factorization.

378313849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 378313849 is about 19450.2917458839. The cubic root of 378313849 is about 723.2427352015.

The spelling of 378313849 in words is "three hundred seventy-eight million, three hundred thirteen thousand, eight hundred forty-nine".