81410959 has 4 divisors (see below), whose sum is σ = 93041104. Its totient is φ = 69780816.

The previous prime is 81410957. The next prime is 81410969. The reversal of 81410959 is 95901418.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 81410959 - 2¹ = 81410957 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 (81410957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5815062 + ... + 5815075.

It is an arithmetic number, because the mean of its divisors is an integer number (23260276).

Almost surely, 2^81410959 is an apocalyptic number.

81410959 is a deficient number, since it is larger than the sum of its proper divisors (11630145).

81410959 is a wasteful number, since it uses less digits than its factorization.

81410959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11630144.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 81410959 is about 9022.8021700578. The cubic root of 81410959 is about 433.4053721785.

It can be divided in two parts, 81410 and 959, that added together give a square (82369 = 287²).

The spelling of 81410959 in words is "eighty-one million, four hundred ten thousand, nine hundred fifty-nine".