1438788899 has 2 divisors, whose sum is σ = 1438788900. Its totient is φ = 1438788898.

The previous prime is 1438788881. The next prime is 1438788947. The reversal of 1438788899 is 9988878341.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438788899 is a prime.

It is a super-2 number, since 2×1438788899² = 4140226991771264402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1438788839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719394449 + 719394450.

It is an arithmetic number, because the mean of its divisors is an integer number (719394450).

Almost surely, 2^1438788899 is an apocalyptic number.

1438788899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438788899 is an equidigital number, since it uses as much as digits as its factorization.

1438788899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27869184, while the sum is 65.

The square root of 1438788899 is about 37931.3709085237. The cubic root of 1438788899 is about 1128.9265653978.

The spelling of 1438788899 in words is "one billion, four hundred thirty-eight million, seven hundred eighty-eight thousand, eight hundred ninety-nine".