1387894423 has 2 divisors, whose sum is σ = 1387894424. Its totient is φ = 1387894422.

The previous prime is 1387894421. The next prime is 1387894447. The reversal of 1387894423 is 3244987831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1387894423 - 2¹ = 1387894421 is a prime.

Together with 1387894421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387894421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693947211 + 693947212.

It is an arithmetic number, because the mean of its divisors is an integer number (693947212).

Almost surely, 2^1387894423 is an apocalyptic number.

1387894423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387894423 is an equidigital number, since it uses as much as digits as its factorization.

1387894423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 49.

The square root of 1387894423 is about 37254.4550758698. The cubic root of 1387894423 is about 1115.4552285953.

The spelling of 1387894423 in words is "one billion, three hundred eighty-seven million, eight hundred ninety-four thousand, four hundred twenty-three".