61890271 has 2 divisors, whose sum is σ = 61890272. Its totient is φ = 61890270.

The previous prime is 61890247. The next prime is 61890281. The reversal of 61890271 is 17209816.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61890271 - 2⁹ = 61889759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61890221) 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, 30945135 + 30945136.

It is an arithmetic number, because the mean of its divisors is an integer number (30945136).

Almost surely, 2^61890271 is an apocalyptic number.

61890271 is a deficient number, since it is larger than the sum of its proper divisors (1).

61890271 is an equidigital number, since it uses as much as digits as its factorization.

61890271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 61890271 is about 7867.0369898711. The cubic root of 61890271 is about 395.5555308878. Note that the first 4 decimals are identical.

The spelling of 61890271 in words is "sixty-one million, eight hundred ninety thousand, two hundred seventy-one".