197541541 has 2 divisors, whose sum is σ = 197541542. Its totient is φ = 197541540.

The previous prime is 197541521. The next prime is 197541571. The reversal of 197541541 is 145145791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163072900 + 34468641 = 12770^2 + 5871^2 .

It is a cyclic number.

It is not a de Polignac number, because 197541541 - 2⁷ = 197541413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197541541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197541511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98770770 + 98770771.

It is an arithmetic number, because the mean of its divisors is an integer number (98770771).

Almost surely, 2^197541541 is an apocalyptic number.

It is an amenable number.

197541541 is a deficient number, since it is larger than the sum of its proper divisors (1).

197541541 is an equidigital number, since it uses as much as digits as its factorization.

197541541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 37.

The square root of 197541541 is about 14054.9472073004. The cubic root of 197541541 is about 582.3974692286.

The spelling of 197541541 in words is "one hundred ninety-seven million, five hundred forty-one thousand, five hundred forty-one".