61746709 has 2 divisors, whose sum is σ = 61746710. Its totient is φ = 61746708.

The previous prime is 61746689. The next prime is 61746721. The reversal of 61746709 is 90764716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50836900 + 10909809 = 7130^2 + 3303^2 .

It is a cyclic number.

It is not a de Polignac number, because 61746709 - 2⁵ = 61746677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61746799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30873354 + 30873355.

It is an arithmetic number, because the mean of its divisors is an integer number (30873355).

Almost surely, 2^61746709 is an apocalyptic number.

It is an amenable number.

61746709 is a deficient number, since it is larger than the sum of its proper divisors (1).

61746709 is an equidigital number, since it uses as much as digits as its factorization.

61746709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 61746709 is about 7857.9074186452. The cubic root of 61746709 is about 395.2494477356.

The spelling of 61746709 in words is "sixty-one million, seven hundred forty-six thousand, seven hundred nine".