61445771 has 2 divisors, whose sum is σ = 61445772. Its totient is φ = 61445770.

The previous prime is 61445749. The next prime is 61445773. The reversal of 61445771 is 17754416.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61445771 - 2¹⁴ = 61429387 is a prime.

Together with 61445773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61445773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30722885 + 30722886.

It is an arithmetic number, because the mean of its divisors is an integer number (30722886).

Almost surely, 2^61445771 is an apocalyptic number.

61445771 is a deficient number, since it is larger than the sum of its proper divisors (1).

61445771 is an equidigital number, since it uses as much as digits as its factorization.

61445771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 61445771 is about 7838.7352934003. The cubic root of 61445771 is about 394.6062861153.

The spelling of 61445771 in words is "sixty-one million, four hundred forty-five thousand, seven hundred seventy-one".