378198973 has 2 divisors, whose sum is σ = 378198974. Its totient is φ = 378198972.

The previous prime is 378198967. The next prime is 378199007. The reversal of 378198973 is 379891873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316057284 + 62141689 = 17778^2 + 7883^2 .

It is a cyclic number.

It is not a de Polignac number, because 378198973 - 2¹³ = 378190781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378190973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189099486 + 189099487.

It is an arithmetic number, because the mean of its divisors is an integer number (189099487).

Almost surely, 2^378198973 is an apocalyptic number.

It is an amenable number.

378198973 is a deficient number, since it is larger than the sum of its proper divisors (1).

378198973 is an equidigital number, since it uses as much as digits as its factorization.

378198973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 55.

The square root of 378198973 is about 19447.3384554288. The cubic root of 378198973 is about 723.1695229347.

The spelling of 378198973 in words is "three hundred seventy-eight million, one hundred ninety-eight thousand, nine hundred seventy-three".