61972271 has 2 divisors, whose sum is σ = 61972272. Its totient is φ = 61972270.

The previous prime is 61972249. The next prime is 61972289. The reversal of 61972271 is 17227916.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61972271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61972201) 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, 30986135 + 30986136.

It is an arithmetic number, because the mean of its divisors is an integer number (30986136).

Almost surely, 2^61972271 is an apocalyptic number.

61972271 is a deficient number, since it is larger than the sum of its proper divisors (1).

61972271 is an equidigital number, since it uses as much as digits as its factorization.

61972271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 61972271 is about 7872.2468838318. The cubic root of 61972271 is about 395.7301476660.

The spelling of 61972271 in words is "sixty-one million, nine hundred seventy-two thousand, two hundred seventy-one".