61988299 has 2 divisors, whose sum is σ = 61988300. Its totient is φ = 61988298.

The previous prime is 61988293. The next prime is 61988359. The reversal of 61988299 is 99288916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61988299 - 2¹¹ = 61986251 is a prime.

It is not a weakly prime, because it can be changed into another prime (61988293) 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, 30994149 + 30994150.

It is an arithmetic number, because the mean of its divisors is an integer number (30994150).

Almost surely, 2^61988299 is an apocalyptic number.

61988299 is a deficient number, since it is larger than the sum of its proper divisors (1).

61988299 is an equidigital number, since it uses as much as digits as its factorization.

61988299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 52.

The square root of 61988299 is about 7873.2648247090. The cubic root of 61988299 is about 395.7642608587.

The spelling of 61988299 in words is "sixty-one million, nine hundred eighty-eight thousand, two hundred ninety-nine".