1139691061 has 2 divisors, whose sum is σ = 1139691062. Its totient is φ = 1139691060.

The previous prime is 1139691053. The next prime is 1139691151. The reversal of 1139691061 is 1601969311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 910168561 + 229522500 = 30169^2 + 15150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1139691061 - 2³ = 1139691053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1139691061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139601061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569845530 + 569845531.

It is an arithmetic number, because the mean of its divisors is an integer number (569845531).

Almost surely, 2^1139691061 is an apocalyptic number.

It is an amenable number.

1139691061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139691061 is an equidigital number, since it uses as much as digits as its factorization.

1139691061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 1139691061 is about 33759.3107305229. The cubic root of 1139691061 is about 1044.5495524341.

The spelling of 1139691061 in words is "one billion, one hundred thirty-nine million, six hundred ninety-one thousand, sixty-one".