69164981 has 2 divisors, whose sum is σ = 69164982. Its totient is φ = 69164980.

The previous prime is 69164929. The next prime is 69164989. The reversal of 69164981 is 18946196.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54982225 + 14182756 = 7415^2 + 3766^2 .

It is a cyclic number.

It is not a de Polignac number, because 69164981 - 2¹⁰ = 69163957 is a prime.

It is a super-2 number, since 2×69164981² = 9567589193460722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69164989) 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, 34582490 + 34582491.

It is an arithmetic number, because the mean of its divisors is an integer number (34582491).

Almost surely, 2^69164981 is an apocalyptic number.

It is an amenable number.

69164981 is a deficient number, since it is larger than the sum of its proper divisors (1).

69164981 is an equidigital number, since it uses as much as digits as its factorization.

69164981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 69164981 is about 8316.5486230768. The cubic root of 69164981 is about 410.4832315418.

The spelling of 69164981 in words is "sixty-nine million, one hundred sixty-four thousand, nine hundred eighty-one".