61189237 has 2 divisors, whose sum is σ = 61189238. Its totient is φ = 61189236.

The previous prime is 61189211. The next prime is 61189267. The reversal of 61189237 is 73298116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37773316 + 23415921 = 6146^2 + 4839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61189237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61189196 and 61189205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61189207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30594618 + 30594619.

It is an arithmetic number, because the mean of its divisors is an integer number (30594619).

Almost surely, 2^61189237 is an apocalyptic number.

It is an amenable number.

61189237 is a deficient number, since it is larger than the sum of its proper divisors (1).

61189237 is an equidigital number, since it uses as much as digits as its factorization.

61189237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 61189237 is about 7822.3549523146. The cubic root of 61189237 is about 394.0563641696.

The spelling of 61189237 in words is "sixty-one million, one hundred eighty-nine thousand, two hundred thirty-seven".