1438150657 has 2 divisors, whose sum is σ = 1438150658. Its totient is φ = 1438150656.

The previous prime is 1438150643. The next prime is 1438150699. The reversal of 1438150657 is 7560518341.

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., 1384509681 + 53640976 = 37209^2 + 7324^2 .

It is a cyclic number.

It is not a de Polignac number, because 1438150657 - 2⁷ = 1438150529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1438150627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719075328 + 719075329.

It is an arithmetic number, because the mean of its divisors is an integer number (719075329).

Almost surely, 2^1438150657 is an apocalyptic number.

It is an amenable number.

1438150657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438150657 is an equidigital number, since it uses as much as digits as its factorization.

1438150657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 1438150657 is about 37922.9568599285. The cubic root of 1438150657 is about 1128.7596113442.

Adding to 1438150657 its reverse (7560518341), we get a palindrome (8998668998).

The spelling of 1438150657 in words is "one billion, four hundred thirty-eight million, one hundred fifty thousand, six hundred fifty-seven".