378720497 has 2 divisors, whose sum is σ = 378720498. Its totient is φ = 378720496.

The previous prime is 378720487. The next prime is 378720499. The reversal of 378720497 is 794027873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269747776 + 108972721 = 16424^2 + 10439^2 .

It is a cyclic number.

It is not a de Polignac number, because 378720497 - 2¹⁴ = 378704113 is a prime.

Together with 378720499, 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 (378720499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189360248 + 189360249.

It is an arithmetic number, because the mean of its divisors is an integer number (189360249).

Almost surely, 2^378720497 is an apocalyptic number.

It is an amenable number.

378720497 is a deficient number, since it is larger than the sum of its proper divisors (1).

378720497 is an equidigital number, since it uses as much as digits as its factorization.

378720497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 378720497 is about 19460.7424575734. The cubic root of 378720497 is about 723.5017792888.

The spelling of 378720497 in words is "three hundred seventy-eight million, seven hundred twenty thousand, four hundred ninety-seven".