81407343 has 8 divisors (see below), whose sum is σ = 114256000. Its totient is φ = 51415128.

The previous prime is 81407329. The next prime is 81407351. The reversal of 81407343 is 34370418.

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

It is not a de Polignac number, because 81407343 - 2⁸ = 81407087 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 81407343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81407303) 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, 714043 + ... + 714156.

It is an arithmetic number, because the mean of its divisors is an integer number (14282000).

Almost surely, 2^81407343 is an apocalyptic number.

81407343 is a deficient number, since it is larger than the sum of its proper divisors (32848657).

81407343 is a wasteful number, since it uses less digits than its factorization.

81407343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428221.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 81407343 is about 9022.6017866245. The cubic root of 81407343 is about 433.3989552823.

The spelling of 81407343 in words is "eighty-one million, four hundred seven thousand, three hundred forty-three".