69840361 has 2 divisors, whose sum is σ = 69840362. Its totient is φ = 69840360.

The previous prime is 69840319. The next prime is 69840373. The reversal of 69840361 is 16304896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66324736 + 3515625 = 8144^2 + 1875^2 .

It is a cyclic number.

It is not a de Polignac number, because 69840361 - 2¹¹ = 69838313 is a prime.

It is a super-2 number, since 2×69840361² = 9755352049220642, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69840361.

It is not a weakly prime, because it can be changed into another prime (69840311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34920180 + 34920181.

It is an arithmetic number, because the mean of its divisors is an integer number (34920181).

Almost surely, 2^69840361 is an apocalyptic number.

It is an amenable number.

69840361 is a deficient number, since it is larger than the sum of its proper divisors (1).

69840361 is an equidigital number, since it uses as much as digits as its factorization.

69840361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 69840361 is about 8357.0545648572. The cubic root of 69840361 is about 411.8149972959.

The spelling of 69840361 in words is "sixty-nine million, eight hundred forty thousand, three hundred sixty-one".