65697983 has 4 divisors (see below), whose sum is σ = 70751688. Its totient is φ = 60644280.

The previous prime is 65697971. The next prime is 65697997. The reversal of 65697983 is 38979656.

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 65697983 - 2¹⁴ = 65681599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65697923) 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, 2526833 + ... + 2526858.

It is an arithmetic number, because the mean of its divisors is an integer number (17687922).

Almost surely, 2^65697983 is an apocalyptic number.

65697983 is a deficient number, since it is larger than the sum of its proper divisors (5053705).

65697983 is a wasteful number, since it uses less digits than its factorization.

65697983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053704.

The product of its digits is 2449440, while the sum is 53.

The square root of 65697983 is about 8105.4292298434. The cubic root of 65697983 is about 403.5066335544.

The spelling of 65697983 in words is "sixty-five million, six hundred ninety-seven thousand, nine hundred eighty-three".