65193971 has 4 divisors (see below), whose sum is σ = 65210832. Its totient is φ = 65177112.

The previous prime is 65193941. The next prime is 65194007. The reversal of 65193971 is 17939156.

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 65193971 - 2¹⁸ = 64931827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65193901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581 + ... + 11433.

It is an arithmetic number, because the mean of its divisors is an integer number (16302708).

Almost surely, 2^65193971 is an apocalyptic number.

65193971 is a deficient number, since it is larger than the sum of its proper divisors (16861).

65193971 is a wasteful number, since it uses less digits than its factorization.

65193971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16860.

The product of its digits is 51030, while the sum is 41.

The square root of 65193971 is about 8074.2783578472. The cubic root of 65193971 is about 402.4721295466.

The spelling of 65193971 in words is "sixty-five million, one hundred ninety-three thousand, nine hundred seventy-one".