65278983 has 32 divisors (see below), whose sum is σ = 108928512. Its totient is φ = 33782400.

The previous prime is 65278979. The next prime is 65278999. The reversal of 65278983 is 38987256.

It is not a de Polignac number, because 65278983 - 2² = 65278979 is a prime.

It is a super-2 number, since 2×65278983² = 8522691243028578, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65278933) 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 31 ways as a sum of consecutive naturals, for example, 106185 + ... + 106797.

It is an arithmetic number, because the mean of its divisors is an integer number (3404016).

Almost surely, 2^65278983 is an apocalyptic number.

65278983 is a deficient number, since it is larger than the sum of its proper divisors (43649529).

65278983 is a wasteful number, since it uses less digits than its factorization.

65278983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095.

The product of its digits is 725760, while the sum is 48.

The square root of 65278983 is about 8079.5410141913. The cubic root of 65278983 is about 402.6469928506.

The spelling of 65278983 in words is "sixty-five million, two hundred seventy-eight thousand, nine hundred eighty-three".