69770021 has 2 divisors, whose sum is σ = 69770022. Its totient is φ = 69770020.

The previous prime is 69769993. The next prime is 69770053. The reversal of 69770021 is 12007796.

It is an a-pointer prime, because the next prime (69770053) can be obtained adding 69770021 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49420900 + 20349121 = 7030^2 + 4511^2 .

It is a cyclic number.

It is not a de Polignac number, because 69770021 - 2¹⁴ = 69753637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69770021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69770321) 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, 34885010 + 34885011.

It is an arithmetic number, because the mean of its divisors is an integer number (34885011).

Almost surely, 2^69770021 is an apocalyptic number.

It is an amenable number.

69770021 is a deficient number, since it is larger than the sum of its proper divisors (1).

69770021 is an equidigital number, since it uses as much as digits as its factorization.

69770021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 69770021 is about 8352.8450841614. The cubic root of 69770021 is about 411.6766971463.

The spelling of 69770021 in words is "sixty-nine million, seven hundred seventy thousand, twenty-one".