61980131 has 2 divisors, whose sum is σ = 61980132. Its totient is φ = 61980130.

The previous prime is 61980119. The next prime is 61980133. The reversal of 61980131 is 13108916.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61980131 - 2¹⁸ = 61717987 is a prime.

It is a super-2 number, since 2×61980131² = 7683073277554322, which contains 22 as substring.

Together with 61980133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61980094 and 61980103.

It is not a weakly prime, because it can be changed into another prime (61980133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30990065 + 30990066.

It is an arithmetic number, because the mean of its divisors is an integer number (30990066).

Almost surely, 2^61980131 is an apocalyptic number.

61980131 is a deficient number, since it is larger than the sum of its proper divisors (1).

61980131 is an equidigital number, since it uses as much as digits as its factorization.

61980131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 61980131 is about 7872.7460901518. The cubic root of 61980131 is about 395.7468772313.

The spelling of 61980131 in words is "sixty-one million, nine hundred eighty thousand, one hundred thirty-one".