1423273378 has 4 divisors (see below), whose sum is σ = 2134910070. Its totient is φ = 711636688.

The previous prime is 1423273349. The next prime is 1423273391. The reversal of 1423273378 is 8733723241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8733723241 = 84131 ⋅103811.

It can be written as a sum of positive squares in only one way, i.e., 1341244129 + 82029249 = 36623^2 + 9057^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1423273378.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355818343 + ... + 355818346.

Almost surely, 2^1423273378 is an apocalyptic number.

1423273378 is a deficient number, since it is larger than the sum of its proper divisors (711636692).

1423273378 is an equidigital number, since it uses as much as digits as its factorization.

1423273378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711636691.

The product of its digits is 169344, while the sum is 40.

The square root of 1423273378 is about 37726.2955774881. The cubic root of 1423273378 is about 1124.8538748150.

The spelling of 1423273378 in words is "one billion, four hundred twenty-three million, two hundred seventy-three thousand, three hundred seventy-eight".