61837081 has 2 divisors, whose sum is σ = 61837082. Its totient is φ = 61837080.

The previous prime is 61837079. The next prime is 61837091. The reversal of 61837081 is 18073816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41216400 + 20620681 = 6420^2 + 4541^2 .

It is a cyclic number.

It is not a de Polignac number, because 61837081 - 2¹ = 61837079 is a prime.

It is a super-2 number, since 2×61837081² = 7647649173201122, which contains 22 as substring.

Together with 61837079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61837091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30918540 + 30918541.

It is an arithmetic number, because the mean of its divisors is an integer number (30918541).

Almost surely, 2^61837081 is an apocalyptic number.

It is an amenable number.

61837081 is a deficient number, since it is larger than the sum of its proper divisors (1).

61837081 is an equidigital number, since it uses as much as digits as its factorization.

61837081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 61837081 is about 7863.6557020256. The cubic root of 61837081 is about 395.4421817375.

The spelling of 61837081 in words is "sixty-one million, eight hundred thirty-seven thousand, eighty-one".