61246981 has 2 divisors, whose sum is σ = 61246982. Its totient is φ = 61246980.

The previous prime is 61246957. The next prime is 61246987. The reversal of 61246981 is 18964216.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42185025 + 19061956 = 6495^2 + 4366^2 .

It is a cyclic number.

It is not a de Polignac number, because 61246981 - 2⁵ = 61246949 is a prime.

It is a super-2 number, since 2×61246981² = 7502385363228722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61246981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61246987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30623490 + 30623491.

It is an arithmetic number, because the mean of its divisors is an integer number (30623491).

Almost surely, 2^61246981 is an apocalyptic number.

It is an amenable number.

61246981 is a deficient number, since it is larger than the sum of its proper divisors (1).

61246981 is an equidigital number, since it uses as much as digits as its factorization.

61246981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 61246981 is about 7826.0450420375. The cubic root of 61246981 is about 394.1802815872.

The spelling of 61246981 in words is "sixty-one million, two hundred forty-six thousand, nine hundred eighty-one".