80921738 has 8 divisors (see below), whose sum is σ = 124663332. Its totient is φ = 39367296.

The previous prime is 80921723. The next prime is 80921759. The reversal of 80921738 is 83712908.

It can be written as a sum of positive squares in 2 ways, for example, as 80227849 + 693889 = 8957^2 + 833^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546695 + ... + 546842.

Almost surely, 2^80921738 is an apocalyptic number.

80921738 is a deficient number, since it is larger than the sum of its proper divisors (43741594).

80921738 is a wasteful number, since it uses less digits than its factorization.

80921738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093576.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 80921738 is about 8995.6510603736. The cubic root of 80921738 is about 432.5354763909.

The spelling of 80921738 in words is "eighty million, nine hundred twenty-one thousand, seven hundred thirty-eight".