81932654 has 4 divisors (see below), whose sum is σ = 122898984. Its totient is φ = 40966326.

The previous prime is 81932633. The next prime is 81932663. The reversal of 81932654 is 45623918.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20483162 + ... + 20483165.

It is an arithmetic number, because the mean of its divisors is an integer number (30724746).

Almost surely, 2^81932654 is an apocalyptic number.

81932654 is a deficient number, since it is larger than the sum of its proper divisors (40966330).

81932654 is a wasteful number, since it uses less digits than its factorization.

81932654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40966329.

The product of its digits is 51840, while the sum is 38.

The square root of 81932654 is about 9051.6658135395. The cubic root of 81932654 is about 434.3291796396.

The spelling of 81932654 in words is "eighty-one million, nine hundred thirty-two thousand, six hundred fifty-four".