31301019989 has 8 divisors (see below), whose sum is σ = 31900950840. Its totient is φ = 30706776000.

The previous prime is 31301019977. The next prime is 31301020039. The reversal of 31301019989 is 98991010313.

It can be written as a sum of positive squares in 4 ways, for example, as 26419901764 + 4881118225 = 162542^2 + 69865^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31301019989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301019949) 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, 1410602 + ... + 1432619.

It is an arithmetic number, because the mean of its divisors is an integer number (3987618855).

Almost surely, 2^31301019989 is an apocalyptic number.

It is an amenable number.

31301019989 is a deficient number, since it is larger than the sum of its proper divisors (599930851).

31301019989 is a wasteful number, since it uses less digits than its factorization.

31301019989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843431.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 31301019989 in words is "thirty-one billion, three hundred one million, nineteen thousand, nine hundred eighty-nine".