69920261 has 2 divisors, whose sum is σ = 69920262. Its totient is φ = 69920260.

The previous prime is 69920243. The next prime is 69920267. The reversal of 69920261 is 16202996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54671236 + 15249025 = 7394^2 + 3905^2 .

It is a cyclic number.

It is not a de Polignac number, because 69920261 - 2¹⁸ = 69658117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69920267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34960130 + 34960131.

It is an arithmetic number, because the mean of its divisors is an integer number (34960131).

Almost surely, 2^69920261 is an apocalyptic number.

It is an amenable number.

69920261 is a deficient number, since it is larger than the sum of its proper divisors (1).

69920261 is an equidigital number, since it uses as much as digits as its factorization.

69920261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 69920261 is about 8361.8335907862. The cubic root of 69920261 is about 411.9719813949.

The spelling of 69920261 in words is "sixty-nine million, nine hundred twenty thousand, two hundred sixty-one".