81473367 has 16 divisors (see below), whose sum is σ = 116167392. Its totient is φ = 50611200.

The previous prime is 81473351. The next prime is 81473377. The reversal of 81473367 is 76337418.

It is not a de Polignac number, because 81473367 - 2⁴ = 81473351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81473377) 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 15 ways as a sum of consecutive naturals, for example, 2758 + ... + 13059.

It is an arithmetic number, because the mean of its divisors is an integer number (7260462).

Almost surely, 2^81473367 is an apocalyptic number.

81473367 is a deficient number, since it is larger than the sum of its proper divisors (34694025).

81473367 is a wasteful number, since it uses less digits than its factorization.

81473367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15938.

The product of its digits is 84672, while the sum is 39.

The square root of 81473367 is about 9026.2598566627. The cubic root of 81473367 is about 433.5160904989.

The spelling of 81473367 in words is "eighty-one million, four hundred seventy-three thousand, three hundred sixty-seven".