69853981 has 2 divisors, whose sum is σ = 69853982. Its totient is φ = 69853980.

The previous prime is 69853963. The next prime is 69853991. The reversal of 69853981 is 18935896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56385081 + 13468900 = 7509^2 + 3670^2 .

It is a cyclic number.

It is not a de Polignac number, because 69853981 - 2²³ = 61465373 is a prime.

It is a super-2 number, since 2×69853981² = 9759157323096722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69853951) 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, 34926990 + 34926991.

It is an arithmetic number, because the mean of its divisors is an integer number (34926991).

Almost surely, 2^69853981 is an apocalyptic number.

It is an amenable number.

69853981 is a deficient number, since it is larger than the sum of its proper divisors (1).

69853981 is an equidigital number, since it uses as much as digits as its factorization.

69853981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 69853981 is about 8357.8694055363. The cubic root of 69853981 is about 411.8417657510.

The spelling of 69853981 in words is "sixty-nine million, eight hundred fifty-three thousand, nine hundred eighty-one".