61140071 has 2 divisors, whose sum is σ = 61140072. Its totient is φ = 61140070.

The previous prime is 61140059. The next prime is 61140097. The reversal of 61140071 is 17004116.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61140071 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61148071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30570035 + 30570036.

It is an arithmetic number, because the mean of its divisors is an integer number (30570036).

Almost surely, 2^61140071 is an apocalyptic number.

61140071 is a deficient number, since it is larger than the sum of its proper divisors (1).

61140071 is an equidigital number, since it uses as much as digits as its factorization.

61140071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 61140071 is about 7819.2116610308. The cubic root of 61140071 is about 393.9507934976.

Adding to 61140071 its reverse (17004116), we get a palindrome (78144187).

The spelling of 61140071 in words is "sixty-one million, one hundred forty thousand, seventy-one".