197920825 has 6 divisors (see below), whose sum is σ = 245421854. Its totient is φ = 158336640.

The previous prime is 197920769. The next prime is 197920829. The reversal of 197920825 is 528029791.

It can be written as a sum of positive squares in 3 ways, for example, as 3485689 + 194435136 = 1867^2 + 13944^2 .

It is not a de Polignac number, because 197920825 - 2¹³ = 197912633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197920829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3958392 + ... + 3958441.

Almost surely, 2^197920825 is an apocalyptic number.

It is an amenable number.

197920825 is a deficient number, since it is larger than the sum of its proper divisors (47501029).

197920825 is an equidigital number, since it uses as much as digits as its factorization.

197920825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7916843 (or 7916838 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 197920825 is about 14068.4336370472. The cubic root of 197920825 is about 582.7699694758.

The spelling of 197920825 in words is "one hundred ninety-seven million, nine hundred twenty thousand, eight hundred twenty-five".