69229981 has 2 divisors, whose sum is σ = 69229982. Its totient is φ = 69229980.

The previous prime is 69229973. The next prime is 69230039. The reversal of 69229981 is 18992296.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47045881 + 22184100 = 6859^2 + 4710^2 .

It is a cyclic number.

It is not a de Polignac number, because 69229981 - 2³ = 69229973 is a prime.

It is a super-2 number, since 2×69229981² = 9585580538520722, 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 (69220981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34614990 + 34614991.

It is an arithmetic number, because the mean of its divisors is an integer number (34614991).

Almost surely, 2^69229981 is an apocalyptic number.

It is an amenable number.

69229981 is a deficient number, since it is larger than the sum of its proper divisors (1).

69229981 is an equidigital number, since it uses as much as digits as its factorization.

69229981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 46.

The square root of 69229981 is about 8320.4555764694. The cubic root of 69229981 is about 410.6117795237.

The spelling of 69229981 in words is "sixty-nine million, two hundred twenty-nine thousand, nine hundred eighty-one".