81249326 has 8 divisors (see below), whose sum is σ = 125805504. Its totient is φ = 39314160.

The previous prime is 81249293. The next prime is 81249361. The reversal of 81249326 is 62394218.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655175 + ... + 655298.

It is an arithmetic number, because the mean of its divisors is an integer number (15725688).

Almost surely, 2^81249326 is an apocalyptic number.

81249326 is a deficient number, since it is larger than the sum of its proper divisors (44556178).

81249326 is a wasteful number, since it uses less digits than its factorization.

81249326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310506.

The product of its digits is 20736, while the sum is 35.

The square root of 81249326 is about 9013.8408017892. The cubic root of 81249326 is about 433.1183550360.

The spelling of 81249326 in words is "eighty-one million, two hundred forty-nine thousand, three hundred twenty-six".