31489669 has 8 divisors (see below), whose sum is σ = 33246080. Its totient is φ = 29825820.

The previous prime is 31489663. The next prime is 31489673. The reversal of 31489669 is 96698413.

It is not a de Polignac number, because 31489669 - 2⁷ = 31489541 is a prime.

It is a super-2 number, since 2×31489669² = 1983198507459122, which contains 22 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 (31489663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4564 + ... + 9154.

It is an arithmetic number, because the mean of its divisors is an integer number (4155760).

Almost surely, 2^31489669 is an apocalyptic number.

It is an amenable number.

31489669 is a deficient number, since it is larger than the sum of its proper divisors (1756411).

31489669 is an frugal number, since it uses more digits than its factorization.

31489669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648 (or 4610 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 31489669 is about 5611.5656460564. The cubic root of 31489669 is about 315.7834500172.

The spelling of 31489669 in words is "thirty-one million, four hundred eighty-nine thousand, six hundred sixty-nine".