61670069 has 2 divisors, whose sum is σ = 61670070. Its totient is φ = 61670068.

The previous prime is 61670053. The next prime is 61670087. The reversal of 61670069 is 96007616.

It is a happy number.

61670069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55726225 + 5943844 = 7465^2 + 2438^2 .

It is a cyclic number.

It is not a de Polignac number, because 61670069 - 2⁴ = 61670053 is a prime.

It is a super-2 number, since 2×61670069² = 7606394820929522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61670569) 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, 30835034 + 30835035.

It is an arithmetic number, because the mean of its divisors is an integer number (30835035).

Almost surely, 2^61670069 is an apocalyptic number.

It is an amenable number.

61670069 is a deficient number, since it is larger than the sum of its proper divisors (1).

61670069 is an equidigital number, since it uses as much as digits as its factorization.

61670069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 61670069 is about 7853.0292881155. The cubic root of 61670069 is about 395.0858521929.

The spelling of 61670069 in words is "sixty-one million, six hundred seventy thousand, sixty-nine".