61447213 has 2 divisors, whose sum is σ = 61447214. Its totient is φ = 61447212.

The previous prime is 61447207. The next prime is 61447219. The reversal of 61447213 is 31274416.

It is a balanced prime because it is at equal distance from previous prime (61447207) and next prime (61447219).

It can be written as a sum of positive squares in only one way, i.e., 58339044 + 3108169 = 7638^2 + 1763^2 .

It is a cyclic number.

It is not a de Polignac number, because 61447213 - 2⁵ = 61447181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61447219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30723606 + 30723607.

It is an arithmetic number, because the mean of its divisors is an integer number (30723607).

Almost surely, 2^61447213 is an apocalyptic number.

It is an amenable number.

61447213 is a deficient number, since it is larger than the sum of its proper divisors (1).

61447213 is an equidigital number, since it uses as much as digits as its factorization.

61447213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 61447213 is about 7838.8272719840. The cubic root of 61447213 is about 394.6093729446.

The spelling of 61447213 in words is "sixty-one million, four hundred forty-seven thousand, two hundred thirteen".