61965889 has 8 divisors (see below), whose sum is σ = 62976960. Its totient is φ = 60958800.

The previous prime is 61965877. The next prime is 61965899. The reversal of 61965889 is 98856916.

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

It is a cyclic number.

It is not a de Polignac number, because 61965889 - 2⁵ = 61965857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61965809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51879 + ... + 53059.

It is an arithmetic number, because the mean of its divisors is an integer number (7872120).

Almost surely, 2^61965889 is an apocalyptic number.

It is an amenable number.

61965889 is a deficient number, since it is larger than the sum of its proper divisors (1011071).

61965889 is a wasteful number, since it uses less digits than its factorization.

61965889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991.

The product of its digits is 933120, while the sum is 52.

The square root of 61965889 is about 7871.8415253357. The cubic root of 61965889 is about 395.7165628994.

The spelling of 61965889 in words is "sixty-one million, nine hundred sixty-five thousand, eight hundred eighty-nine".