61327709 has 2 divisors, whose sum is σ = 61327710. Its totient is φ = 61327708.

The previous prime is 61327691. The next prime is 61327711. The reversal of 61327709 is 90772316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46963609 + 14364100 = 6853^2 + 3790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61327709 is a prime.

It is a super-2 number, since 2×61327709² = 7522175782377362, which contains 22 as substring.

Together with 61327711, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3636179 and since 61327709 and 3636179 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61327769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30663854 + 30663855.

It is an arithmetic number, because the mean of its divisors is an integer number (30663855).

Almost surely, 2^61327709 is an apocalyptic number.

It is an amenable number.

61327709 is a deficient number, since it is larger than the sum of its proper divisors (1).

61327709 is an equidigital number, since it uses as much as digits as its factorization.

61327709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 61327709 is about 7831.2009934620. The cubic root of 61327709 is about 394.3533916982.

The spelling of 61327709 in words is "sixty-one million, three hundred twenty-seven thousand, seven hundred nine".