81526087 has 8 divisors (see below), whose sum is σ = 82252800. Its totient is φ = 80802744.

The previous prime is 81526079. The next prime is 81526091. The reversal of 81526087 is 78062518.

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 81526087 - 2³ = 81526079 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 (81526787) 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, 74458 + ... + 75544.

It is an arithmetic number, because the mean of its divisors is an integer number (10281600).

Almost surely, 2^81526087 is an apocalyptic number.

81526087 is a deficient number, since it is larger than the sum of its proper divisors (726713).

81526087 is a wasteful number, since it uses less digits than its factorization.

81526087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 81526087 is about 9029.1797523363. The cubic root of 81526087 is about 433.6095772469.

The spelling of 81526087 in words is "eighty-one million, five hundred twenty-six thousand, eighty-seven".