197940459025 has 27 divisors (see below), whose sum is σ = 248182094899. Its totient is φ = 156606560000.

The previous prime is 197940459023. The next prime is 197940459029. The reversal of 197940459025 is 520954049791.

It is a happy number.

The square root of 197940459025 is 444905.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 81069464529 + 116870994496 = 284727^2 + 341864^2 .

It is not a de Polignac number, because 197940459025 - 2¹ = 197940459023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197940459023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 224676585 + ... + 224677465.

Almost surely, 2^197940459025 is an apocalyptic number.

197940459025 is the 444905-th square number.

197940459025 is the 222453-rd centered octagonal number.

It is an amenable number.

197940459025 is a deficient number, since it is larger than the sum of its proper divisors (50241635874).

197940459025 is an frugal number, since it uses more digits than its factorization.

197940459025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 197940459025 in words is "one hundred ninety-seven billion, nine hundred forty million, four hundred fifty-nine thousand, twenty-five".