69438661 has 2 divisors, whose sum is σ = 69438662. Its totient is φ = 69438660.

The previous prime is 69438653. The next prime is 69438671. The reversal of 69438661 is 16683496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56700900 + 12737761 = 7530^2 + 3569^2 .

It is a cyclic number.

It is not a de Polignac number, because 69438661 - 2³ = 69438653 is a prime.

It is a super-3 number, since 3×69438661³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69438671) 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, 34719330 + 34719331.

It is an arithmetic number, because the mean of its divisors is an integer number (34719331).

Almost surely, 2^69438661 is an apocalyptic number.

It is an amenable number.

69438661 is a deficient number, since it is larger than the sum of its proper divisors (1).

69438661 is an equidigital number, since it uses as much as digits as its factorization.

69438661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 69438661 is about 8332.9863194415. The cubic root of 69438661 is about 411.0239348446.

The spelling of 69438661 in words is "sixty-nine million, four hundred thirty-eight thousand, six hundred sixty-one".