81403367 has 8 divisors (see below), whose sum is σ = 83790000. Its totient is φ = 79026624.

The previous prime is 81403363. The next prime is 81403369. The reversal of 81403367 is 76330418.

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 81403367 - 2² = 81403363 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 (81403363) 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, 16259 + ... + 20667.

It is an arithmetic number, because the mean of its divisors is an integer number (10473750).

Almost surely, 2^81403367 is an apocalyptic number.

81403367 is a deficient number, since it is larger than the sum of its proper divisors (2386633).

81403367 is a wasteful number, since it uses less digits than its factorization.

81403367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 81403367 is about 9022.3814483760. The cubic root of 81403367 is about 433.3918993164.

The spelling of 81403367 in words is "eighty-one million, four hundred three thousand, three hundred sixty-seven".