80949823 has 4 divisors (see below), whose sum is σ = 85210360. Its totient is φ = 76689288.

The previous prime is 80949809. The next prime is 80949859. The reversal of 80949823 is 32894908.

It is a happy number.

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 80949823 - 2⁹ = 80949311 is a prime.

It is a super-3 number, since 3×80949823³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80949823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80949893) 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, 2130240 + ... + 2130277.

It is an arithmetic number, because the mean of its divisors is an integer number (21302590).

Almost surely, 2^80949823 is an apocalyptic number.

80949823 is a deficient number, since it is larger than the sum of its proper divisors (4260537).

80949823 is a wasteful number, since it uses less digits than its factorization.

80949823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260536.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 80949823 is about 8997.2119570454. The cubic root of 80949823 is about 432.5855097280.

The spelling of 80949823 in words is "eighty million, nine hundred forty-nine thousand, eight hundred twenty-three".