1139880661 has 8 divisors (see below), whose sum is σ = 1204441920. Its totient is φ = 1075776192.

The previous prime is 1139880631. The next prime is 1139880697. The reversal of 1139880661 is 1660889311.

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 1139880661 - 2¹⁵ = 1139847893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139880601) 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, 109060 + ... + 119053.

It is an arithmetic number, because the mean of its divisors is an integer number (150555240).

Almost surely, 2^1139880661 is an apocalyptic number.

It is an amenable number.

1139880661 is a deficient number, since it is larger than the sum of its proper divisors (64561259).

1139880661 is a wasteful number, since it uses less digits than its factorization.

1139880661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228395.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1139880661 is about 33762.1187279472. The cubic root of 1139880661 is about 1044.6074732808.

The spelling of 1139880661 in words is "one billion, one hundred thirty-nine million, eight hundred eighty thousand, six hundred sixty-one".