378656923 has 2 divisors, whose sum is σ = 378656924. Its totient is φ = 378656922.

The previous prime is 378656917. The next prime is 378656933. The reversal of 378656923 is 329656873.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378656923 - 2¹³ = 378648731 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (378656933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189328461 + 189328462.

It is an arithmetic number, because the mean of its divisors is an integer number (189328462).

Almost surely, 2^378656923 is an apocalyptic number.

378656923 is a deficient number, since it is larger than the sum of its proper divisors (1).

378656923 is an equidigital number, since it uses as much as digits as its factorization.

378656923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 49.

The square root of 378656923 is about 19459.1089981016. The cubic root of 378656923 is about 723.4612934279.

Subtracting from 378656923 its reverse (329656873), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 378656923 in words is "three hundred seventy-eight million, six hundred fifty-six thousand, nine hundred twenty-three".