197929829 has 2 divisors, whose sum is σ = 197929830. Its totient is φ = 197929828.

The previous prime is 197929769. The next prime is 197929867. The reversal of 197929829 is 928929791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176092900 + 21836929 = 13270^2 + 4673^2 .

It is a cyclic number.

It is not a de Polignac number, because 197929829 - 2⁸ = 197929573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197929729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98964914 + 98964915.

It is an arithmetic number, because the mean of its divisors is an integer number (98964915).

Almost surely, 2^197929829 is an apocalyptic number.

It is an amenable number.

197929829 is a deficient number, since it is larger than the sum of its proper divisors (1).

197929829 is an equidigital number, since it uses as much as digits as its factorization.

197929829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 56.

The square root of 197929829 is about 14068.7536406037. The cubic root of 197929829 is about 582.7788066480.

The spelling of 197929829 in words is "one hundred ninety-seven million, nine hundred twenty-nine thousand, eight hundred twenty-nine".