61415413 has 2 divisors, whose sum is σ = 61415414. Its totient is φ = 61415412.

The previous prime is 61415399. The next prime is 61415443. The reversal of 61415413 is 31451416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55621764 + 5793649 = 7458^2 + 2407^2 .

It is a cyclic number.

It is not a de Polignac number, because 61415413 - 2⁵ = 61415381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61415443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30707706 + 30707707.

It is an arithmetic number, because the mean of its divisors is an integer number (30707707).

Almost surely, 2^61415413 is an apocalyptic number.

It is an amenable number.

61415413 is a deficient number, since it is larger than the sum of its proper divisors (1).

61415413 is an equidigital number, since it uses as much as digits as its factorization.

61415413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 61415413 is about 7836.7986448549. The cubic root of 61415413 is about 394.5412887969.

Adding to 61415413 its reverse (31451416), we get a palindrome (92866829).

The spelling of 61415413 in words is "sixty-one million, four hundred fifteen thousand, four hundred thirteen".