378093689 has 2 divisors, whose sum is σ = 378093690. Its totient is φ = 378093688.

The previous prime is 378093647. The next prime is 378093691. The reversal of 378093689 is 986390873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335622400 + 42471289 = 18320^2 + 6517^2 .

It is a cyclic number.

It is not a de Polignac number, because 378093689 - 2²⁸ = 109658233 is a prime.

Together with 378093691, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 378093689.

It is not a weakly prime, because it can be changed into another prime (378993689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189046844 + 189046845.

It is an arithmetic number, because the mean of its divisors is an integer number (189046845).

Almost surely, 2^378093689 is an apocalyptic number.

It is an amenable number.

378093689 is a deficient number, since it is larger than the sum of its proper divisors (1).

378093689 is an equidigital number, since it uses as much as digits as its factorization.

378093689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 378093689 is about 19444.6313670380. The cubic root of 378093689 is about 723.1024107779.

The spelling of 378093689 in words is "three hundred seventy-eight million, ninety-three thousand, six hundred eighty-nine".