1138525811 has 2 divisors, whose sum is σ = 1138525812. Its totient is φ = 1138525810.

The previous prime is 1138525799. The next prime is 1138525813. The reversal of 1138525811 is 1185258311.

It is a strong prime.

It is an emirp because it is prime and its reverse (1185258311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1138525811 - 2¹⁰ = 1138524787 is a prime.

Together with 1138525813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1138525813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569262905 + 569262906.

It is an arithmetic number, because the mean of its divisors is an integer number (569262906).

Almost surely, 2^1138525811 is an apocalyptic number.

1138525811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138525811 is an equidigital number, since it uses as much as digits as its factorization.

1138525811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 35.

The square root of 1138525811 is about 33742.0481150745. The cubic root of 1138525811 is about 1044.1934394304.

The spelling of 1138525811 in words is "one billion, one hundred thirty-eight million, five hundred twenty-five thousand, eight hundred eleven".