197928061 has 2 divisors, whose sum is σ = 197928062. Its totient is φ = 197928060.

The previous prime is 197928043. The next prime is 197928083. The reversal of 197928061 is 160829791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138791961 + 59136100 = 11781^2 + 7690^2 .

It is an emirp because it is prime and its reverse (160829791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197928061 - 2²¹ = 195830909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197927999 and 197928017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197925061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98964030 + 98964031.

It is an arithmetic number, because the mean of its divisors is an integer number (98964031).

Almost surely, 2^197928061 is an apocalyptic number.

It is an amenable number.

197928061 is a deficient number, since it is larger than the sum of its proper divisors (1).

197928061 is an equidigital number, since it uses as much as digits as its factorization.

197928061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 197928061 is about 14068.6908061838. The cubic root of 197928061 is about 582.7770714270. Note that the first 3 decimals are identical.

The spelling of 197928061 in words is "one hundred ninety-seven million, nine hundred twenty-eight thousand, sixty-one".