31020029989 has 8 divisors (see below), whose sum is σ = 33410684160. Its totient is φ = 28630018416.

The previous prime is 31020029987. The next prime is 31020030073. The reversal of 31020029989 is 98992002013.

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 31020029989 - 2¹ = 31020029987 is a prime.

It is a super-3 number, since 3×31020029989³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020029981) 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, 57949 + ... + 255730.

It is an arithmetic number, because the mean of its divisors is an integer number (4176335520).

Almost surely, 2^31020029989 is an apocalyptic number.

It is an amenable number.

31020029989 is a deficient number, since it is larger than the sum of its proper divisors (2390654171).

31020029989 is a wasteful number, since it uses less digits than its factorization.

31020029989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321299.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 31020029989 in words is "thirty-one billion, twenty million, twenty-nine thousand, nine hundred eighty-nine".