1139705409 has 8 divisors (see below), whose sum is σ = 1525662432. Its totient is φ = 756776000.

The previous prime is 1139705401. The next prime is 1139705459. The reversal of 1139705409 is 9045079311.

It is a happy number.

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 1139705409 - 2³ = 1139705401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1139705401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756024 + ... + 757529.

It is an arithmetic number, because the mean of its divisors is an integer number (190707804).

Almost surely, 2^1139705409 is an apocalyptic number.

It is an amenable number.

1139705409 is a deficient number, since it is larger than the sum of its proper divisors (385957023).

1139705409 is a wasteful number, since it uses less digits than its factorization.

1139705409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513807.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 1139705409 is about 33759.5232341927. The cubic root of 1139705409 is about 1044.5539358249.

The spelling of 1139705409 in words is "one billion, one hundred thirty-nine million, seven hundred five thousand, four hundred nine".