61447913 has 2 divisors, whose sum is σ = 61447914. Its totient is φ = 61447912.

The previous prime is 61447907. The next prime is 61447933. The reversal of 61447913 is 31974416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60264169 + 1183744 = 7763^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 61447913 - 2¹⁴ = 61431529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61447933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30723956 + 30723957.

It is an arithmetic number, because the mean of its divisors is an integer number (30723957).

Almost surely, 2^61447913 is an apocalyptic number.

It is an amenable number.

61447913 is a deficient number, since it is larger than the sum of its proper divisors (1).

61447913 is an equidigital number, since it uses as much as digits as its factorization.

61447913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 61447913 is about 7838.8719213928. The cubic root of 61447913 is about 394.6108713880.

The spelling of 61447913 in words is "sixty-one million, four hundred forty-seven thousand, nine hundred thirteen".