61443601 has 2 divisors, whose sum is σ = 61443602. Its totient is φ = 61443600.

The previous prime is 61443563. The next prime is 61443607. The reversal of 61443601 is 10634416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53875600 + 7568001 = 7340^2 + 2751^2 .

It is a cyclic number.

It is not a de Polignac number, because 61443601 - 2⁹ = 61443089 is a prime.

It is a super-2 number, since 2×61443601² = 7550632207694402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61443607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30721800 + 30721801.

It is an arithmetic number, because the mean of its divisors is an integer number (30721801).

Almost surely, 2^61443601 is an apocalyptic number.

It is an amenable number.

61443601 is a deficient number, since it is larger than the sum of its proper divisors (1).

61443601 is an equidigital number, since it uses as much as digits as its factorization.

61443601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 61443601 is about 7838.5968769927. The cubic root of 61443601 is about 394.6016407958.

The spelling of 61443601 in words is "sixty-one million, four hundred forty-three thousand, six hundred one".