1438773899 has 2 divisors, whose sum is σ = 1438773900. Its totient is φ = 1438773898.

The previous prime is 1438773827. The next prime is 1438773913. The reversal of 1438773899 is 9983778341.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438773899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1438733899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719386949 + 719386950.

It is an arithmetic number, because the mean of its divisors is an integer number (719386950).

Almost surely, 2^1438773899 is an apocalyptic number.

1438773899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438773899 is an equidigital number, since it uses as much as digits as its factorization.

1438773899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 59.

The square root of 1438773899 is about 37931.1731824894. The cubic root of 1438773899 is about 1128.9226422007.

The spelling of 1438773899 in words is "one billion, four hundred thirty-eight million, seven hundred seventy-three thousand, eight hundred ninety-nine".