378997 has 2 divisors, whose sum is σ = 378998. Its totient is φ = 378996.

The previous prime is 378977. The next prime is 379007. The reversal of 378997 is 799873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239121 + 139876 = 489^2 + 374^2 .

It is an emirp because it is prime and its reverse (799873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378997 - 2⁷ = 378869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189498 + 189499.

It is an arithmetic number, because the mean of its divisors is an integer number (189499).

2³⁷⁸⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

378997 is a deficient number, since it is larger than the sum of its proper divisors (1).

378997 is an equidigital number, since it uses as much as digits as its factorization.

378997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 43.

The square root of 378997 is about 615.6273223306. The cubic root of 378997 is about 72.3677812140.

The spelling of 378997 in words is "three hundred seventy-eight thousand, nine hundred ninety-seven".