61889199 has 16 divisors (see below), whose sum is σ = 84000000. Its totient is φ = 40525056.

The previous prime is 61889189. The next prime is 61889207. The reversal of 61889199 is 99198816.

It is a happy number.

It is not a de Polignac number, because 61889199 - 2⁸ = 61888943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61889119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48927 + ... + 50175.

It is an arithmetic number, because the mean of its divisors is an integer number (5250000).

Almost surely, 2^61889199 is an apocalyptic number.

61889199 is a deficient number, since it is larger than the sum of its proper divisors (22110801).

61889199 is a wasteful number, since it uses less digits than its factorization.

61889199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534.

The product of its digits is 279936, while the sum is 51.

The square root of 61889199 is about 7866.9688571902. The cubic root of 61889199 is about 395.5532470717.

The spelling of 61889199 in words is "sixty-one million, eight hundred eighty-nine thousand, one hundred ninety-nine".