61065971 has 2 divisors, whose sum is σ = 61065972. Its totient is φ = 61065970.

The previous prime is 61065937. The next prime is 61065997. The reversal of 61065971 is 17956016.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61065971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61065931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30532985 + 30532986.

It is an arithmetic number, because the mean of its divisors is an integer number (30532986).

Almost surely, 2^61065971 is an apocalyptic number.

61065971 is a deficient number, since it is larger than the sum of its proper divisors (1).

61065971 is an equidigital number, since it uses as much as digits as its factorization.

61065971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 61065971 is about 7814.4718951443. The cubic root of 61065971 is about 393.7915768308.

The spelling of 61065971 in words is "sixty-one million, sixty-five thousand, nine hundred seventy-one".