378608381 has 2 divisors, whose sum is σ = 378608382. Its totient is φ = 378608380.

The previous prime is 378608371. The next prime is 378608429. The reversal of 378608381 is 183806873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205922500 + 172685881 = 14350^2 + 13141^2 .

It is a cyclic number.

It is not a de Polignac number, because 378608381 - 2⁶ = 378608317 is a prime.

It is a super-2 number, since 2×378608381² = 286688612326882322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378608341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189304190 + 189304191.

It is an arithmetic number, because the mean of its divisors is an integer number (189304191).

Almost surely, 2^378608381 is an apocalyptic number.

It is an amenable number.

378608381 is a deficient number, since it is larger than the sum of its proper divisors (1).

378608381 is an equidigital number, since it uses as much as digits as its factorization.

378608381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 378608381 is about 19457.8616759396. The cubic root of 378608381 is about 723.4303773517.

The spelling of 378608381 in words is "three hundred seventy-eight million, six hundred eight thousand, three hundred eighty-one".