1438297129 has 2 divisors, whose sum is σ = 1438297130. Its totient is φ = 1438297128.

The previous prime is 1438297127. The next prime is 1438297151. The reversal of 1438297129 is 9217928341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1378265625 + 60031504 = 37125^2 + 7748^2 .

It is a cyclic number.

It is not a de Polignac number, because 1438297129 - 2¹ = 1438297127 is a prime.

Together with 1438297127, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1438297127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719148564 + 719148565.

It is an arithmetic number, because the mean of its divisors is an integer number (719148565).

Almost surely, 2^1438297129 is an apocalyptic number.

It is an amenable number.

1438297129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438297129 is an equidigital number, since it uses as much as digits as its factorization.

1438297129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 1438297129 is about 37924.8879892875. The cubic root of 1438297129 is about 1128.7979304787.

The spelling of 1438297129 in words is "one billion, four hundred thirty-eight million, two hundred ninety-seven thousand, one hundred twenty-nine".