31869009289 has 8 divisors (see below), whose sum is σ = 34322087240. Its totient is φ = 29416162176.

The previous prime is 31869009259. The next prime is 31869009307. The reversal of 31869009289 is 98290096813.

It can be written as a sum of positive squares in 4 ways, for example, as 979189264 + 30889820025 = 31292^2 + 175755^2 .

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 31869009289 - 2⁵ = 31869009257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31869009209) 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, 321229 + ... + 408565.

It is an arithmetic number, because the mean of its divisors is an integer number (4290260905).

Almost surely, 2^31869009289 is an apocalyptic number.

It is an amenable number.

31869009289 is a deficient number, since it is larger than the sum of its proper divisors (2453077951).

31869009289 is a wasteful number, since it uses less digits than its factorization.

31869009289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115419.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 31869009289 in words is "thirty-one billion, eight hundred sixty-nine million, nine thousand, two hundred eighty-nine".