69966749 has 2 divisors, whose sum is σ = 69966750. Its totient is φ = 69966748.

The previous prime is 69966739. The next prime is 69966751. The reversal of 69966749 is 94766996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 4761124 = 8075^2 + 2182^2 .

It is a cyclic number.

It is not a de Polignac number, because 69966749 - 2⁴ = 69966733 is a prime.

Together with 69966751, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 69966694 and 69966703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69966739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34983374 + 34983375.

It is an arithmetic number, because the mean of its divisors is an integer number (34983375).

Almost surely, 2^69966749 is an apocalyptic number.

It is an amenable number.

69966749 is a deficient number, since it is larger than the sum of its proper divisors (1).

69966749 is an equidigital number, since it uses as much as digits as its factorization.

69966749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 56.

The square root of 69966749 is about 8364.6129019818. The cubic root of 69966749 is about 412.0632639992.

The spelling of 69966749 in words is "sixty-nine million, nine hundred sixty-six thousand, seven hundred forty-nine".