1139505761 has 8 divisors (see below), whose sum is σ = 1171456704. Its totient is φ = 1107615600.

The previous prime is 1139505713. The next prime is 1139505769. The reversal of 1139505761 is 1675059311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1139505761 - 2¹⁸ = 1139243617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1139505769) 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 in 7 ways as a sum of consecutive naturals, for example, 24236 + ... + 53538.

It is an arithmetic number, because the mean of its divisors is an integer number (146432088).

Almost surely, 2^1139505761 is an apocalyptic number.

It is an amenable number.

1139505761 is a deficient number, since it is larger than the sum of its proper divisors (31950943).

1139505761 is a wasteful number, since it uses less digits than its factorization.

1139505761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30391.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 1139505761 is about 33756.5661908909. The cubic root of 1139505761 is about 1044.4929389858.

The spelling of 1139505761 in words is "one billion, one hundred thirty-nine million, five hundred five thousand, seven hundred sixty-one".