969147521 has 2 divisors, whose sum is σ = 969147522. Its totient is φ = 969147520.

The previous prime is 969147503. The next prime is 969147581. The reversal of 969147521 is 125741969.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533841025 + 435306496 = 23105^2 + 20864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-969147521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (969147581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484573760 + 484573761.

It is an arithmetic number, because the mean of its divisors is an integer number (484573761).

Almost surely, 2^969147521 is an apocalyptic number.

It is an amenable number.

969147521 is a deficient number, since it is larger than the sum of its proper divisors (1).

969147521 is an equidigital number, since it uses as much as digits as its factorization.

969147521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 969147521 is about 31131.1342710156. The cubic root of 969147521 is about 989.6082254201.

The spelling of 969147521 in words is "nine hundred sixty-nine million, one hundred forty-seven thousand, five hundred twenty-one".