61999873 has 8 divisors (see below), whose sum is σ = 66830400. Its totient is φ = 57178128.

The previous prime is 61999859. The next prime is 61999897. The reversal of 61999873 is 37899916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61999873 is a prime.

It is a super-2 number, since 2×61999873² = 7687968504032258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61999873.

It is not an unprimeable number, because it can be changed into a prime (61999853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25338 + ... + 27676.

It is an arithmetic number, because the mean of its divisors is an integer number (8353800).

Almost surely, 2^61999873 is an apocalyptic number.

It is an amenable number.

61999873 is a deficient number, since it is larger than the sum of its proper divisors (4830527).

61999873 is a wasteful number, since it uses less digits than its factorization.

61999873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391.

The product of its digits is 734832, while the sum is 52.

The square root of 61999873 is about 7873.9998094996. Note that the first 3 decimals coincide. The cubic root of 61999873 is about 395.7888907247.

The spelling of 61999873 in words is "sixty-one million, nine hundred ninety-nine thousand, eight hundred seventy-three".