197156041 has 2 divisors, whose sum is σ = 197156042. Its totient is φ = 197156040.

The previous prime is 197155999. The next prime is 197156051. The reversal of 197156041 is 140651791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115777600 + 81378441 = 10760^2 + 9021^2 .

It is a cyclic number.

It is not a de Polignac number, because 197156041 - 2¹³ = 197147849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197155988 and 197156006.

It is not a weakly prime, because it can be changed into another prime (197156051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98578020 + 98578021.

It is an arithmetic number, because the mean of its divisors is an integer number (98578021).

Almost surely, 2^197156041 is an apocalyptic number.

It is an amenable number.

197156041 is a deficient number, since it is larger than the sum of its proper divisors (1).

197156041 is an equidigital number, since it uses as much as digits as its factorization.

197156041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 197156041 is about 14041.2264777690. The cubic root of 197156041 is about 582.0183752460.

The spelling of 197156041 in words is "one hundred ninety-seven million, one hundred fifty-six thousand, forty-one".