61900171 has 2 divisors, whose sum is σ = 61900172. Its totient is φ = 61900170.

The previous prime is 61900151. The next prime is 61900187. The reversal of 61900171 is 17100916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61900171 - 2¹⁹ = 61375883 is a prime.

It is not a weakly prime, because it can be changed into another prime (61900121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30950085 + 30950086.

It is an arithmetic number, because the mean of its divisors is an integer number (30950086).

Almost surely, 2^61900171 is an apocalyptic number.

61900171 is a deficient number, since it is larger than the sum of its proper divisors (1).

61900171 is an equidigital number, since it uses as much as digits as its factorization.

61900171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 61900171 is about 7867.6661723792. Note that the first 3 decimals coincide. The cubic root of 61900171 is about 395.5766208529.

The spelling of 61900171 in words is "sixty-one million, nine hundred thousand, one hundred seventy-one".