80723653 has 4 divisors (see below), whose sum is σ = 80861760. Its totient is φ = 80585548.

The previous prime is 80723627. The next prime is 80723681. The reversal of 80723653 is 35632708.

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 80723653 - 2¹³ = 80715461 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 (80723693) 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, 68173 + ... + 69346.

It is an arithmetic number, because the mean of its divisors is an integer number (20215440).

Almost surely, 2^80723653 is an apocalyptic number.

It is an amenable number.

80723653 is a deficient number, since it is larger than the sum of its proper divisors (138107).

80723653 is a wasteful number, since it uses less digits than its factorization.

80723653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138106.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 80723653 is about 8984.6342719111. The cubic root of 80723653 is about 432.1822594143.

The spelling of 80723653 in words is "eighty million, seven hundred twenty-three thousand, six hundred fifty-three".