1021610197 has 2 divisors, whose sum is σ = 1021610198. Its totient is φ = 1021610196.

The previous prime is 1021610179. The next prime is 1021610269. The reversal of 1021610197 is 7910161201.

1021610197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (1021610179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1019461041 + 2149156 = 31929^2 + 1466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021610197 is a prime.

It is a super-2 number, since 2×1021610197² = 2087374789228757618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021610897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510805098 + 510805099.

It is an arithmetic number, because the mean of its divisors is an integer number (510805099).

Almost surely, 2^1021610197 is an apocalyptic number.

It is an amenable number.

1021610197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021610197 is an equidigital number, since it uses as much as digits as its factorization.

1021610197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 28.

The square root of 1021610197 is about 31962.6375163252. The cubic root of 1021610197 is about 1007.1521241693.

Adding to 1021610197 its reverse (7910161201), we get a palindrome (8931771398).

The spelling of 1021610197 in words is "one billion, twenty-one million, six hundred ten thousand, one hundred ninety-seven".