61670689 has 2 divisors, whose sum is σ = 61670690. Its totient is φ = 61670688.

The previous prime is 61670633. The next prime is 61670711. The reversal of 61670689 is 98607616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47720464 + 13950225 = 6908^2 + 3735^2 .

It is a cyclic number.

It is not a de Polignac number, because 61670689 - 2⁹ = 61670177 is a prime.

It is not a weakly prime, because it can be changed into another prime (61670629) 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, 30835344 + 30835345.

It is an arithmetic number, because the mean of its divisors is an integer number (30835345).

Almost surely, 2^61670689 is an apocalyptic number.

It is an amenable number.

61670689 is a deficient number, since it is larger than the sum of its proper divisors (1).

61670689 is an equidigital number, since it uses as much as digits as its factorization.

61670689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 61670689 is about 7853.0687632288. The cubic root of 61670689 is about 395.0871761870.

The spelling of 61670689 in words is "sixty-one million, six hundred seventy thousand, six hundred eighty-nine".