61236137 has 2 divisors, whose sum is σ = 61236138. Its totient is φ = 61236136.

The previous prime is 61236089. The next prime is 61236163. The reversal of 61236137 is 73163216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34445161 + 26790976 = 5869^2 + 5176^2 .

It is a cyclic number.

It is not a de Polignac number, because 61236137 - 2¹⁰ = 61235113 is a prime.

It is not a weakly prime, because it can be changed into another prime (61236337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30618068 + 30618069.

It is an arithmetic number, because the mean of its divisors is an integer number (30618069).

Almost surely, 2^61236137 is an apocalyptic number.

It is an amenable number.

61236137 is a deficient number, since it is larger than the sum of its proper divisors (1).

61236137 is an equidigital number, since it uses as much as digits as its factorization.

61236137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 61236137 is about 7825.3521965468. The cubic root of 61236137 is about 394.1570165315.

The spelling of 61236137 in words is "sixty-one million, two hundred thirty-six thousand, one hundred thirty-seven".