1005231197 has 2 divisors, whose sum is σ = 1005231198. Its totient is φ = 1005231196.

The previous prime is 1005231193. The next prime is 1005231229. The reversal of 1005231197 is 7911325001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 900660121 + 104571076 = 30011^2 + 10226^2 .

It is an emirp because it is prime and its reverse (7911325001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1005231197 - 2² = 1005231193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005231193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502615598 + 502615599.

It is an arithmetic number, because the mean of its divisors is an integer number (502615599).

Almost surely, 2^1005231197 is an apocalyptic number.

It is an amenable number.

1005231197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005231197 is an equidigital number, since it uses as much as digits as its factorization.

1005231197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1005231197 is about 31705.3811994116. The cubic root of 1005231197 is about 1001.7407005368.

Adding to 1005231197 its reverse (7911325001), we get a palindrome (8916556198).

The spelling of 1005231197 in words is "one billion, five million, two hundred thirty-one thousand, one hundred ninety-seven".