31470849 has 10 divisors (see below), whose sum is σ = 47012130. Its totient is φ = 20980512.

The previous prime is 31470847. The next prime is 31470853. The reversal of 31470849 is 94807413.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 31438449 + 32400 = 5607^2 + 180^2 .

It is not a de Polignac number, because 31470849 - 2¹ = 31470847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31470847) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 194184 + ... + 194345.

It is an arithmetic number, because the mean of its divisors is an integer number (4701213).

Almost surely, 2^31470849 is an apocalyptic number.

It is an amenable number.

31470849 is a deficient number, since it is larger than the sum of its proper divisors (15541281).

31470849 is an equidigital number, since it uses as much as digits as its factorization.

31470849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388541 (or 388532 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 31470849 is about 5609.8885015658. Note that the first 3 decimals coincide. The cubic root of 31470849 is about 315.7205274876.

The spelling of 31470849 in words is "thirty-one million, four hundred seventy thousand, eight hundred forty-nine".