61971419 has 2 divisors, whose sum is σ = 61971420. Its totient is φ = 61971418.

The previous prime is 61971397. The next prime is 61971421. The reversal of 61971419 is 91417916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61971419 - 2⁸ = 61971163 is a prime.

It is a super-2 number, since 2×61971419² = 7680913545747122, which contains 22 as substring.

Together with 61971421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61971439) 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, 30985709 + 30985710.

It is an arithmetic number, because the mean of its divisors is an integer number (30985710).

Almost surely, 2^61971419 is an apocalyptic number.

61971419 is a deficient number, since it is larger than the sum of its proper divisors (1).

61971419 is an equidigital number, since it uses as much as digits as its factorization.

61971419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 38.

The square root of 61971419 is about 7872.1927694893. The cubic root of 61971419 is about 395.7283341472.

The spelling of 61971419 in words is "sixty-one million, nine hundred seventy-one thousand, four hundred nineteen".