81434099 has 8 divisors (see below), whose sum is σ = 85281792. Its totient is φ = 77612040.

The previous prime is 81434047. The next prime is 81434107. The reversal of 81434099 is 99043418.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81434099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81434599) 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, 254 + ... + 12764.

It is an arithmetic number, because the mean of its divisors is an integer number (10660224).

Almost surely, 2^81434099 is an apocalyptic number.

81434099 is a deficient number, since it is larger than the sum of its proper divisors (3847693).

81434099 is a wasteful number, since it uses less digits than its factorization.

81434099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12817.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 81434099 is about 9024.0843856870. The cubic root of 81434099 is about 433.4464315575.

It can be divided in two parts, 8143409 and 9, that added together give a palindrome (8143418).

The spelling of 81434099 in words is "eighty-one million, four hundred thirty-four thousand, ninety-nine".