1138975791 has 16 divisors (see below), whose sum is σ = 1528664544. Its totient is φ = 754314624.

The previous prime is 1138975781. The next prime is 1138975793. The reversal of 1138975791 is 1975798311.

It is not a de Polignac number, because 1138975791 - 2⁵ = 1138975759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138975793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588261 + ... + 590193.

It is an arithmetic number, because the mean of its divisors is an integer number (95541534).

Almost surely, 2^1138975791 is an apocalyptic number.

1138975791 is a deficient number, since it is larger than the sum of its proper divisors (389688753).

1138975791 is a wasteful number, since it uses less digits than its factorization.

1138975791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130.

The product of its digits is 476280, while the sum is 51.

The square root of 1138975791 is about 33748.7153977748. The cubic root of 1138975791 is about 1044.3309869710.

The spelling of 1138975791 in words is "one billion, one hundred thirty-eight million, nine hundred seventy-five thousand, seven hundred ninety-one".