971787469 has 2 divisors, whose sum is σ = 971787470. Its totient is φ = 971787468.

The previous prime is 971787451. The next prime is 971787491. The reversal of 971787469 is 964787179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 890246569 + 81540900 = 29837^2 + 9030^2 .

It is a cyclic number.

It is not a de Polignac number, because 971787469 - 2¹¹ = 971785421 is a prime.

It is a super-2 number, since 2×971787469² = 1888741769810851922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971785469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485893734 + 485893735.

It is an arithmetic number, because the mean of its divisors is an integer number (485893735).

Almost surely, 2^971787469 is an apocalyptic number.

It is an amenable number.

971787469 is a deficient number, since it is larger than the sum of its proper divisors (1).

971787469 is an equidigital number, since it uses as much as digits as its factorization.

971787469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 58.

The square root of 971787469 is about 31173.5058823996. The cubic root of 971787469 is about 990.5059716793.

The spelling of 971787469 in words is "nine hundred seventy-one million, seven hundred eighty-seven thousand, four hundred sixty-nine".