31798149 has 8 divisors (see below), whose sum is σ = 42469152. Its totient is φ = 21162960.

The previous prime is 31798127. The next prime is 31798159. The reversal of 31798149 is 94189713.

It is a happy number.

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

It is not a de Polignac number, because 31798149 - 2¹³ = 31789957 is a prime.

It is a super-3 number, since 3×31798149³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 31798149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31798159) 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, 6807 + ... + 10484.

It is an arithmetic number, because the mean of its divisors is an integer number (5308644).

Almost surely, 2^31798149 is an apocalyptic number.

It is an amenable number.

31798149 is a deficient number, since it is larger than the sum of its proper divisors (10671003).

31798149 is a wasteful number, since it uses less digits than its factorization.

31798149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17907.

The product of its digits is 54432, while the sum is 42.

The square root of 31798149 is about 5638.9847490484. The cubic root of 31798149 is about 316.8112633577.

The spelling of 31798149 in words is "thirty-one million, seven hundred ninety-eight thousand, one hundred forty-nine".