31986069 has 8 divisors (see below), whose sum is σ = 42733920. Its totient is φ = 21281136.

The previous prime is 31986067. The next prime is 31986091. The reversal of 31986069 is 96068913.

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

It is not a de Polignac number, because 31986069 - 2¹ = 31986067 is a prime.

It is a super-2 number, since 2×31986069² = 2046217220145522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31986069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31986067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8947 + ... + 12000.

It is an arithmetic number, because the mean of its divisors is an integer number (5341740).

Almost surely, 2^31986069 is an apocalyptic number.

It is an amenable number.

31986069 is a deficient number, since it is larger than the sum of its proper divisors (10747851).

31986069 is a wasteful number, since it uses less digits than its factorization.

31986069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21459.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 31986069 is about 5655.6227773783. The cubic root of 31986069 is about 317.4341326980.

The spelling of 31986069 in words is "thirty-one million, nine hundred eighty-six thousand, sixty-nine".