970569781 has 2 divisors, whose sum is σ = 970569782. Its totient is φ = 970569780.

The previous prime is 970569779. The next prime is 970569833. The reversal of 970569781 is 187965079.

It is a happy number.

It is an a-pointer prime, because the next prime (970569833) can be obtained adding 970569781 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 862596900 + 107972881 = 29370^2 + 10391^2 .

It is a cyclic number.

It is not a de Polignac number, because 970569781 - 2¹ = 970569779 is a prime.

It is a super-2 number, since 2×970569781² = 1884011399580775922, which contains 22 as substring.

Together with 970569779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (970569751) 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, 485284890 + 485284891.

It is an arithmetic number, because the mean of its divisors is an integer number (485284891).

Almost surely, 2^970569781 is an apocalyptic number.

970569781 is the 19704-th centered pentagonal number.

It is an amenable number.

970569781 is a deficient number, since it is larger than the sum of its proper divisors (1).

970569781 is an equidigital number, since it uses as much as digits as its factorization.

970569781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 52.

The square root of 970569781 is about 31153.9689445823. The cubic root of 970569781 is about 990.0920844183.

The spelling of 970569781 in words is "nine hundred seventy million, five hundred sixty-nine thousand, seven hundred eighty-one".