61537361 has 2 divisors, whose sum is σ = 61537362. Its totient is φ = 61537360.

The previous prime is 61537339. The next prime is 61537363. The reversal of 61537361 is 16373516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61528336 + 9025 = 7844^2 + 95^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61537361 is a prime.

Together with 61537363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61537363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30768680 + 30768681.

It is an arithmetic number, because the mean of its divisors is an integer number (30768681).

Almost surely, 2^61537361 is an apocalyptic number.

It is an amenable number.

61537361 is a deficient number, since it is larger than the sum of its proper divisors (1).

61537361 is an equidigital number, since it uses as much as digits as its factorization.

61537361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 32.

The square root of 61537361 is about 7844.5752593751. The cubic root of 61537361 is about 394.8022532067.

The spelling of 61537361 in words is "sixty-one million, five hundred thirty-seven thousand, three hundred sixty-one".