1138637739 has 16 divisors (see below), whose sum is σ = 1530685728. Its totient is φ = 752865792.

The previous prime is 1138637737. The next prime is 1138637749. The reversal of 1138637739 is 9377368311.

It is not a de Polignac number, because 1138637739 - 2¹ = 1138637737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138637737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196309 + ... + 202025.

It is an arithmetic number, because the mean of its divisors is an integer number (95667858).

Almost surely, 2^1138637739 is an apocalyptic number.

1138637739 is a deficient number, since it is larger than the sum of its proper divisors (392047989).

1138637739 is a wasteful number, since it uses less digits than its factorization.

1138637739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6254.

The product of its digits is 571536, while the sum is 48.

The square root of 1138637739 is about 33743.7066576866. The cubic root of 1138637739 is about 1044.2276563837.

The spelling of 1138637739 in words is "one billion, one hundred thirty-eight million, six hundred thirty-seven thousand, seven hundred thirty-nine".