61771049 has 2 divisors, whose sum is σ = 61771050. Its totient is φ = 61771048.

The previous prime is 61771043. The next prime is 61771097. The reversal of 61771049 is 94017716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56731024 + 5040025 = 7532^2 + 2245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61771049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61771043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30885524 + 30885525.

It is an arithmetic number, because the mean of its divisors is an integer number (30885525).

Almost surely, 2^61771049 is an apocalyptic number.

It is an amenable number.

61771049 is a deficient number, since it is larger than the sum of its proper divisors (1).

61771049 is an equidigital number, since it uses as much as digits as its factorization.

61771049 is an evil number, because the sum of its binary digits is even.

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

The square root of 61771049 is about 7859.4560244332. The cubic root of 61771049 is about 395.3013755112.

The spelling of 61771049 in words is "sixty-one million, seven hundred seventy-one thousand, forty-nine".