61398653 has 2 divisors, whose sum is σ = 61398654. Its totient is φ = 61398652.

The previous prime is 61398647. The next prime is 61398703. The reversal of 61398653 is 35689316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57183844 + 4214809 = 7562^2 + 2053^2 .

It is a cyclic number.

It is not a de Polignac number, because 61398653 - 2⁴ = 61398637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61398653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61398613) 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, 30699326 + 30699327.

It is an arithmetic number, because the mean of its divisors is an integer number (30699327).

Almost surely, 2^61398653 is an apocalyptic number.

It is an amenable number.

61398653 is a deficient number, since it is larger than the sum of its proper divisors (1).

61398653 is an equidigital number, since it uses as much as digits as its factorization.

61398653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 61398653 is about 7835.7292577015. The cubic root of 61398653 is about 394.5053959958.

The spelling of 61398653 in words is "sixty-one million, three hundred ninety-eight thousand, six hundred fifty-three".