31470097 has 2 divisors, whose sum is σ = 31470098. Its totient is φ = 31470096.

The previous prime is 31470073. The next prime is 31470143. The reversal of 31470097 is 79007413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31460881 + 9216 = 5609^2 + 96^2 .

It is an emirp because it is prime and its reverse (79007413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31470097 - 2¹⁹ = 30945809 is a prime.

It is not a weakly prime, because it can be changed into another prime (31470037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15735048 + 15735049.

It is an arithmetic number, because the mean of its divisors is an integer number (15735049).

Almost surely, 2^31470097 is an apocalyptic number.

It is an amenable number.

31470097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31470097 is an equidigital number, since it uses as much as digits as its factorization.

31470097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 31470097 is about 5609.8214766604. The cubic root of 31470097 is about 315.7180127400.

The spelling of 31470097 in words is "thirty-one million, four hundred seventy thousand, ninety-seven".