81674332 has 6 divisors (see below), whose sum is σ = 142930088. Its totient is φ = 40837164.

The previous prime is 81674323. The next prime is 81674339. The reversal of 81674332 is 23347618.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81674339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10209288 + ... + 10209295.

Almost surely, 2^81674332 is an apocalyptic number.

It is an amenable number.

81674332 is a deficient number, since it is larger than the sum of its proper divisors (61255756).

81674332 is a wasteful number, since it uses less digits than its factorization.

81674332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20418587 (or 20418585 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 81674332 is about 9037.3852413184. The cubic root of 81674332 is about 433.8722397126.

The spelling of 81674332 in words is "eighty-one million, six hundred seventy-four thousand, three hundred thirty-two".