81325077 has 8 divisors (see below), whose sum is σ = 112172640. Its totient is φ = 52347120.

The previous prime is 81325063. The next prime is 81325081. The reversal of 81325077 is 77052318.

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

It is not a de Polignac number, because 81325077 - 2²² = 77130773 is a prime.

It is a super-2 number, since 2×81325077² = 13227536298111858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81325007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467299 + ... + 467472.

It is an arithmetic number, because the mean of its divisors is an integer number (14021580).

Almost surely, 2^81325077 is an apocalyptic number.

81325077 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

81325077 is a deficient number, since it is larger than the sum of its proper divisors (30847563).

81325077 is a wasteful number, since it uses less digits than its factorization.

81325077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934803.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 81325077 is about 9018.0417497370. The cubic root of 81325077 is about 433.2529159779.

The spelling of 81325077 in words is "eighty-one million, three hundred twenty-five thousand, seventy-seven".