378197973 has 6 divisors (see below), whose sum is σ = 546285974. Its totient is φ = 252131976.

The previous prime is 378197969. The next prime is 378198013. The reversal of 378197973 is 379791873.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 274830084 + 103367889 = 16578^2 + 10167^2 .

It is not a de Polignac number, because 378197973 - 2² = 378197969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378197933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21010990 + ... + 21011007.

Almost surely, 2^378197973 is an apocalyptic number.

It is an amenable number.

378197973 is a deficient number, since it is larger than the sum of its proper divisors (168088001).

378197973 is a wasteful number, since it uses less digits than its factorization.

378197973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42022003 (or 42022000 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 54.

The square root of 378197973 is about 19447.3127449527. The cubic root of 378197973 is about 723.1688855540.

The spelling of 378197973 in words is "three hundred seventy-eight million, one hundred ninety-seven thousand, nine hundred seventy-three".