81769074 has 8 divisors (see below), whose sum is σ = 163538160. Its totient is φ = 27256356.

The previous prime is 81769073. The next prime is 81769087. The reversal of 81769074 is 47096718.

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

81769074 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (81769073) 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, 6814084 + ... + 6814095.

It is an arithmetic number, because the mean of its divisors is an integer number (20442270).

Almost surely, 2^81769074 is an apocalyptic number.

81769074 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81769074 is a wasteful number, since it uses less digits than its factorization.

81769074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13628184.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 81769074 is about 9042.6253931035. The cubic root of 81769074 is about 434.0399384201.

The spelling of 81769074 in words is "eighty-one million, seven hundred sixty-nine thousand, seventy-four".