80311391 has 8 divisors (see below), whose sum is σ = 82218240. Its totient is φ = 78412888.

The previous prime is 80311379. The next prime is 80311459. The reversal of 80311391 is 19311308.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80311391 - 2⁶ = 80311327 is a prime.

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 80311391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80311351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20120 + ... + 23778.

It is an arithmetic number, because the mean of its divisors is an integer number (10277280).

Almost surely, 2^80311391 is an apocalyptic number.

80311391 is a deficient number, since it is larger than the sum of its proper divisors (1906849).

80311391 is a wasteful number, since it uses less digits than its factorization.

80311391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 80311391 is about 8961.6622899996. The cubic root of 80311391 is about 431.4452738557.

Adding to 80311391 its reverse (19311308), we get a palindrome (99622699).

The spelling of 80311391 in words is "eighty million, three hundred eleven thousand, three hundred ninety-one".