31479189 has 16 divisors (see below), whose sum is σ = 50790528. Its totient is φ = 16929792.

The previous prime is 31479131. The next prime is 31479197. The reversal of 31479189 is 98197413.

It is a happy number.

It is not a de Polignac number, because 31479189 - 2⁷ = 31479061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31479189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31479289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43732 + ... + 44445.

It is an arithmetic number, because the mean of its divisors is an integer number (3174408).

Almost surely, 2^31479189 is an apocalyptic number.

It is an amenable number.

31479189 is a deficient number, since it is larger than the sum of its proper divisors (19311339).

31479189 is a wasteful number, since it uses less digits than its factorization.

31479189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88204.

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

The square root of 31479189 is about 5610.6317826070. The cubic root of 31479189 is about 315.7484144234.

The spelling of 31479189 in words is "thirty-one million, four hundred seventy-nine thousand, one hundred eighty-nine".