31071097 has 2 divisors, whose sum is σ = 31071098. Its totient is φ = 31071096.

The previous prime is 31071067. The next prime is 31071101. The reversal of 31071097 is 79017013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30647296 + 423801 = 5536^2 + 651^2 .

It is an emirp because it is prime and its reverse (79017013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31071097 - 2⁷ = 31070969 is a prime.

It is not a weakly prime, because it can be changed into another prime (31071017) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15535548 + 15535549.

It is an arithmetic number, because the mean of its divisors is an integer number (15535549).

Almost surely, 2^31071097 is an apocalyptic number.

It is an amenable number.

31071097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31071097 is an equidigital number, since it uses as much as digits as its factorization.

31071097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1323, while the sum is 28.

The square root of 31071097 is about 5574.1454053514. The cubic root of 31071097 is about 314.3780353634.

The spelling of 31071097 in words is "thirty-one million, seventy-one thousand, ninety-seven".