1138499539 has 2 divisors, whose sum is σ = 1138499540. Its totient is φ = 1138499538.

The previous prime is 1138499507. The next prime is 1138499567. The reversal of 1138499539 is 9359948311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1138499539 - 2⁵ = 1138499507 is a prime.

It is not a weakly prime, because it can be changed into another prime (1138499599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569249769 + 569249770.

It is an arithmetic number, because the mean of its divisors is an integer number (569249770).

Almost surely, 2^1138499539 is an apocalyptic number.

1138499539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138499539 is an equidigital number, since it uses as much as digits as its factorization.

1138499539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 52.

The square root of 1138499539 is about 33741.6588062887. The cubic root of 1138499539 is about 1044.1854076227.

The spelling of 1138499539 in words is "one billion, one hundred thirty-eight million, four hundred ninety-nine thousand, five hundred thirty-nine".