197260621 has 2 divisors, whose sum is σ = 197260622. Its totient is φ = 197260620.

The previous prime is 197260619. The next prime is 197260633. The reversal of 197260621 is 126062791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187306596 + 9954025 = 13686^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 197260621 - 2¹ = 197260619 is a prime.

Together with 197260619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197260681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98630310 + 98630311.

It is an arithmetic number, because the mean of its divisors is an integer number (98630311).

Almost surely, 2^197260621 is an apocalyptic number.

It is an amenable number.

197260621 is a deficient number, since it is larger than the sum of its proper divisors (1).

197260621 is an equidigital number, since it uses as much as digits as its factorization.

197260621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 197260621 is about 14044.9500177110. The cubic root of 197260621 is about 582.1212662054.

The spelling of 197260621 in words is "one hundred ninety-seven million, two hundred sixty thousand, six hundred twenty-one".