69940961 has 2 divisors, whose sum is σ = 69940962. Its totient is φ = 69940960.

The previous prime is 69940939. The next prime is 69940963. The reversal of 69940961 is 16904996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 4977361 = 8060^2 + 2231^2 .

It is a cyclic number.

It is not a de Polignac number, because 69940961 - 2²⁶ = 2832097 is a prime.

Together with 69940963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69940963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34970480 + 34970481.

It is an arithmetic number, because the mean of its divisors is an integer number (34970481).

Almost surely, 2^69940961 is an apocalyptic number.

It is an amenable number.

69940961 is a deficient number, since it is larger than the sum of its proper divisors (1).

69940961 is an equidigital number, since it uses as much as digits as its factorization.

69940961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 69940961 is about 8363.0712659884. The cubic root of 69940961 is about 412.0126323616.

The spelling of 69940961 in words is "sixty-nine million, nine hundred forty thousand, nine hundred sixty-one".