61635983 has 2 divisors, whose sum is σ = 61635984. Its totient is φ = 61635982.

The previous prime is 61635961. The next prime is 61635989. The reversal of 61635983 is 38953616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61635983 - 2¹⁰ = 61634959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61635983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61635989) 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, 30817991 + 30817992.

It is an arithmetic number, because the mean of its divisors is an integer number (30817992).

Almost surely, 2^61635983 is an apocalyptic number.

61635983 is a deficient number, since it is larger than the sum of its proper divisors (1).

61635983 is an equidigital number, since it uses as much as digits as its factorization.

61635983 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 61635983 is about 7850.8587428383. The cubic root of 61635983 is about 395.0130487598.

The spelling of 61635983 in words is "sixty-one million, six hundred thirty-five thousand, nine hundred eighty-three".