61346981 has 2 divisors, whose sum is σ = 61346982. Its totient is φ = 61346980.

The previous prime is 61346963. The next prime is 61346983. The reversal of 61346981 is 18964316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60202081 + 1144900 = 7759^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 61346981 - 2¹⁰ = 61345957 is a prime.

It is a super-2 number, since 2×61346981² = 7526904155628722, which contains 22 as substring.

Together with 61346983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61346983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30673490 + 30673491.

It is an arithmetic number, because the mean of its divisors is an integer number (30673491).

Almost surely, 2^61346981 is an apocalyptic number.

It is an amenable number.

61346981 is a deficient number, since it is larger than the sum of its proper divisors (1).

61346981 is an equidigital number, since it uses as much as digits as its factorization.

61346981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 61346981 is about 7832.4313594184. The cubic root of 61346981 is about 394.3946953913.

The spelling of 61346981 in words is "sixty-one million, three hundred forty-six thousand, nine hundred eighty-one".