31439149 has 16 divisors (see below), whose sum is σ = 37065600. Its totient is φ = 26107200.

The previous prime is 31439141. The next prime is 31439189. The reversal of 31439149 is 94193413.

It is not a de Polignac number, because 31439149 - 2³ = 31439141 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 (31439141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44499 + ... + 45199.

It is an arithmetic number, because the mean of its divisors is an integer number (2316600).

Almost surely, 2^31439149 is an apocalyptic number.

It is an amenable number.

31439149 is a deficient number, since it is larger than the sum of its proper divisors (5626451).

31439149 is a wasteful number, since it uses less digits than its factorization.

31439149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900.

The product of its digits is 11664, while the sum is 34.

The square root of 31439149 is about 5607.0624216251. The cubic root of 31439149 is about 315.6144854060.

The spelling of 31439149 in words is "thirty-one million, four hundred thirty-nine thousand, one hundred forty-nine".