378632897 has 2 divisors, whose sum is σ = 378632898. Its totient is φ = 378632896.

The previous prime is 378632873. The next prime is 378632899. The reversal of 378632897 is 798236873.

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., 367450561 + 11182336 = 19169^2 + 3344^2 .

It is a cyclic number.

It is not a de Polignac number, because 378632897 - 2¹⁶ = 378567361 is a prime.

It is a super-2 number, since 2×378632897² = 286725741381225218, which contains 22 as substring.

Together with 378632899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (378632899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189316448 + 189316449.

It is an arithmetic number, because the mean of its divisors is an integer number (189316449).

Almost surely, 2^378632897 is an apocalyptic number.

It is an amenable number.

378632897 is a deficient number, since it is larger than the sum of its proper divisors (1).

378632897 is an equidigital number, since it uses as much as digits as its factorization.

378632897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The square root of 378632897 is about 19458.4916424681. The cubic root of 378632897 is about 723.4459917589.

The spelling of 378632897 in words is "three hundred seventy-eight million, six hundred thirty-two thousand, eight hundred ninety-seven".