61356413 has 2 divisors, whose sum is σ = 61356414. Its totient is φ = 61356412.

The previous prime is 61356359. The next prime is 61356419. The reversal of 61356413 is 31465316.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35366809 + 25989604 = 5947^2 + 5098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61356413 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61356419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30678206 + 30678207.

It is an arithmetic number, because the mean of its divisors is an integer number (30678207).

Almost surely, 2^61356413 is an apocalyptic number.

It is an amenable number.

61356413 is a deficient number, since it is larger than the sum of its proper divisors (1).

61356413 is an equidigital number, since it uses as much as digits as its factorization.

61356413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 61356413 is about 7833.0334481604. The cubic root of 61356413 is about 394.4149068729.

The spelling of 61356413 in words is "sixty-one million, three hundred fifty-six thousand, four hundred thirteen".