197424869 has 2 divisors, whose sum is σ = 197424870. Its totient is φ = 197424868.

The previous prime is 197424827. The next prime is 197424889. The reversal of 197424869 is 968424791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164224225 + 33200644 = 12815^2 + 5762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197424869 is a prime.

It is a super-2 number, since 2×197424869² = 77953157799334322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197424889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98712434 + 98712435.

It is an arithmetic number, because the mean of its divisors is an integer number (98712435).

Almost surely, 2^197424869 is an apocalyptic number.

It is an amenable number.

197424869 is a deficient number, since it is larger than the sum of its proper divisors (1).

197424869 is an equidigital number, since it uses as much as digits as its factorization.

197424869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 197424869 is about 14050.7960272719. The cubic root of 197424869 is about 582.2827881021.

The spelling of 197424869 in words is "one hundred ninety-seven million, four hundred twenty-four thousand, eight hundred sixty-nine".