423181378 has 4 divisors (see below), whose sum is σ = 634772070. Its totient is φ = 211590688.

The previous prime is 423181351. The next prime is 423181379. The reversal of 423181378 is 873181324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 379977049 + 43204329 = 19493^2 + 6573^2 .

It is not an unprimeable number, because it can be changed into a prime (423181379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105795343 + ... + 105795346.

Almost surely, 2^423181378 is an apocalyptic number.

423181378 is a deficient number, since it is larger than the sum of its proper divisors (211590692).

423181378 is a wasteful number, since it uses less digits than its factorization.

423181378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211590691.

The product of its digits is 32256, while the sum is 37.

The square root of 423181378 is about 20571.3727786942. The cubic root of 423181378 is about 750.7733522203.

The spelling of 423181378 in words is "four hundred twenty-three million, one hundred eighty-one thousand, three hundred seventy-eight".