61236761 has 2 divisors, whose sum is σ = 61236762. Its totient is φ = 61236760.

The previous prime is 61236757. The next prime is 61236803. The reversal of 61236761 is 16763216.

61236761 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., 53290000 + 7946761 = 7300^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 61236761 - 2² = 61236757 is a prime.

It is a super-2 number, since 2×61236761² = 7499881795542242, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (61236731) 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, 30618380 + 30618381.

It is an arithmetic number, because the mean of its divisors is an integer number (30618381).

Almost surely, 2^61236761 is an apocalyptic number.

It is an amenable number.

61236761 is a deficient number, since it is larger than the sum of its proper divisors (1).

61236761 is an equidigital number, since it uses as much as digits as its factorization.

61236761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 61236761 is about 7825.3920668552. The cubic root of 61236761 is about 394.1583553551.

Adding to 61236761 its reverse (16763216), we get a palindrome (77999977).

It can be divided in two parts, 612 and 36761, that added together give a palindrome (37373).

The spelling of 61236761 in words is "sixty-one million, two hundred thirty-six thousand, seven hundred sixty-one".