197148929 has 2 divisors, whose sum is σ = 197148930. Its totient is φ = 197148928.

The previous prime is 197148899. The next prime is 197148947. The reversal of 197148929 is 929841791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176172529 + 20976400 = 13273^2 + 4580^2 .

It is an emirp because it is prime and its reverse (929841791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197148929 is a prime.

It is not a weakly prime, because it can be changed into another prime (197148979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98574464 + 98574465.

It is an arithmetic number, because the mean of its divisors is an integer number (98574465).

Almost surely, 2^197148929 is an apocalyptic number.

It is an amenable number.

197148929 is a deficient number, since it is larger than the sum of its proper divisors (1).

197148929 is an equidigital number, since it uses as much as digits as its factorization.

197148929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 50.

The square root of 197148929 is about 14040.9732212550. The cubic root of 197148929 is about 582.0113767886.

The spelling of 197148929 in words is "one hundred ninety-seven million, one hundred forty-eight thousand, nine hundred twenty-nine".