61361761 has 2 divisors, whose sum is σ = 61361762. Its totient is φ = 61361760.

The previous prime is 61361759. The next prime is 61361779. The reversal of 61361761 is 16716316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45481536 + 15880225 = 6744^2 + 3985^2 .

It is a cyclic number.

It is not a de Polignac number, because 61361761 - 2¹ = 61361759 is a prime.

It is a super-2 number, since 2×61361761² = 7530531426042242, which contains 22 as substring.

Together with 61361759, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3638047 and since 61361761 and 3638047 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (61361161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30680880 + 30680881.

It is an arithmetic number, because the mean of its divisors is an integer number (30680881).

Almost surely, 2^61361761 is an apocalyptic number.

It is an amenable number.

61361761 is a deficient number, since it is larger than the sum of its proper divisors (1).

61361761 is an equidigital number, since it uses as much as digits as its factorization.

61361761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 61361761 is about 7833.3748154930. The cubic root of 61361761 is about 394.4263659828.

The spelling of 61361761 in words is "sixty-one million, three hundred sixty-one thousand, seven hundred sixty-one".