81769246 has 8 divisors (see below), whose sum is σ = 132088824. Its totient is φ = 37739640.

The previous prime is 81769243. The next prime is 81769249. The reversal of 81769246 is 64296718.

It is an interprime number because it is at equal distance from previous prime (81769243) and next prime (81769249).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81769243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572460 + ... + 1572511.

It is an arithmetic number, because the mean of its divisors is an integer number (16511103).

Almost surely, 2^81769246 is an apocalyptic number.

81769246 is a deficient number, since it is larger than the sum of its proper divisors (50319578).

81769246 is a wasteful number, since it uses less digits than its factorization.

81769246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144986.

The product of its digits is 145152, while the sum is 43.

The square root of 81769246 is about 9042.6349036108. The cubic root of 81769246 is about 434.0402427520.

The spelling of 81769246 in words is "eighty-one million, seven hundred sixty-nine thousand, two hundred forty-six".