31070197 has 2 divisors, whose sum is σ = 31070198. Its totient is φ = 31070196.

The previous prime is 31070177. The next prime is 31070219. The reversal of 31070197 is 79107013.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29149201 + 1920996 = 5399^2 + 1386^2 .

It is a cyclic number.

It is not a de Polignac number, because 31070197 - 2¹⁵ = 31037429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31070177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15535098 + 15535099.

It is an arithmetic number, because the mean of its divisors is an integer number (15535099).

Almost surely, 2^31070197 is an apocalyptic number.

It is an amenable number.

31070197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31070197 is an equidigital number, since it uses as much as digits as its factorization.

31070197 is an evil number, because the sum of its binary digits is even.

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

The square root of 31070197 is about 5574.0646749029. The cubic root of 31070197 is about 314.3749999275.

It can be divided in two parts, 310 and 70197, that added together give a palindrome (70507).

The spelling of 31070197 in words is "thirty-one million, seventy thousand, one hundred ninety-seven".