9970531 has 2 divisors, whose sum is σ = 9970532. Its totient is φ = 9970530.

The previous prime is 9970529. The next prime is 9970537. The reversal of 9970531 is 1350799.

It is a weak prime.

It is an emirp because it is prime and its reverse (1350799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9970531 - 2¹ = 9970529 is a prime.

It is a super-2 number, since 2×9970531² = 198822976843922, which contains 22 as substring.

Together with 9970529, it forms a pair of twin primes.

9970531 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9970537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4985265 + 4985266.

It is an arithmetic number, because the mean of its divisors is an integer number (4985266).

Almost surely, 2^9970531 is an apocalyptic number.

9970531 is a deficient number, since it is larger than the sum of its proper divisors (1).

9970531 is an equidigital number, since it uses as much as digits as its factorization.

9970531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 9970531 is about 3157.6147643435. The cubic root of 9970531 is about 215.2316306583.

It can be divided in two parts, 9970 and 531, that added together give a palindrome (10501).

The spelling of 9970531 in words is "nine million, nine hundred seventy thousand, five hundred thirty-one".