61965817 has 4 divisors (see below), whose sum is σ = 62165376. Its totient is φ = 61766260.

The previous prime is 61965811. The next prime is 61965829. The reversal of 61965817 is 71856916.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61965817 - 2³ = 61965809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61965811) 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, 99313 + ... + 99934.

It is an arithmetic number, because the mean of its divisors is an integer number (15541344).

Almost surely, 2^61965817 is an apocalyptic number.

It is an amenable number.

61965817 is a deficient number, since it is larger than the sum of its proper divisors (199559).

61965817 is a wasteful number, since it uses less digits than its factorization.

61965817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199558.

The product of its digits is 90720, while the sum is 43.

The square root of 61965817 is about 7871.8369520716. The cubic root of 61965817 is about 395.7164096344.

The spelling of 61965817 in words is "sixty-one million, nine hundred sixty-five thousand, eight hundred seventeen".