1438287923 has 2 divisors, whose sum is σ = 1438287924. Its totient is φ = 1438287922.

The previous prime is 1438287883. The next prime is 1438287947. The reversal of 1438287923 is 3297828341.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1438287923 - 2¹⁴ = 1438271539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1438287623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719143961 + 719143962.

It is an arithmetic number, because the mean of its divisors is an integer number (719143962).

Almost surely, 2^1438287923 is an apocalyptic number.

1438287923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438287923 is an equidigital number, since it uses as much as digits as its factorization.

1438287923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 1438287923 is about 37924.7666176075. The cubic root of 1438287923 is about 1128.7955221363.

The spelling of 1438287923 in words is "one billion, four hundred thirty-eight million, two hundred eighty-seven thousand, nine hundred twenty-three".