61989299 has 4 divisors (see below), whose sum is σ = 62038680. Its totient is φ = 61939920.

The previous prime is 61989289. The next prime is 61989329. The reversal of 61989299 is 99298916.

61989299 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61989299 - 2⁴ = 61989283 is a prime.

It is a super-2 number, since 2×61989299² = 7685346381022802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61989299.

It is not an unprimeable number, because it can be changed into a prime (61989289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22757 + ... + 25334.

It is an arithmetic number, because the mean of its divisors is an integer number (15509670).

Almost surely, 2^61989299 is an apocalyptic number.

61989299 is a deficient number, since it is larger than the sum of its proper divisors (49381).

61989299 is a wasteful number, since it uses less digits than its factorization.

61989299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49380.

The product of its digits is 629856, while the sum is 53.

The square root of 61989299 is about 7873.3283305093. The cubic root of 61989299 is about 395.7663890137.

The spelling of 61989299 in words is "sixty-one million, nine hundred eighty-nine thousand, two hundred ninety-nine".