61049081 has 2 divisors, whose sum is σ = 61049082. Its totient is φ = 61049080.

The previous prime is 61049069. The next prime is 61049083. The reversal of 61049081 is 18094016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32959081 + 28090000 = 5741^2 + 5300^2 .

It is a cyclic number.

It is not a de Polignac number, because 61049081 - 2⁶ = 61049017 is a prime.

It is a super-2 number, since 2×61049081² = 7453980581889122, which contains 22 as substring.

Together with 61049083, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3620774 and since 61049081 and 3620774 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (61049083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30524540 + 30524541.

It is an arithmetic number, because the mean of its divisors is an integer number (30524541).

Almost surely, 2^61049081 is an apocalyptic number.

It is an amenable number.

61049081 is a deficient number, since it is larger than the sum of its proper divisors (1).

61049081 is an equidigital number, since it uses as much as digits as its factorization.

61049081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 61049081 is about 7813.3911331764. The cubic root of 61049081 is about 393.7552677216.

The spelling of 61049081 in words is "sixty-one million, forty-nine thousand, eighty-one".