80803978 has 4 divisors (see below), whose sum is σ = 121205970. Its totient is φ = 40401988.

The previous prime is 80803969. The next prime is 80803993. The reversal of 80803978 is 87930808.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 72641529 + 8162449 = 8523^2 + 2857^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200993 + ... + 20200996.

Almost surely, 2^80803978 is an apocalyptic number.

80803978 is a deficient number, since it is larger than the sum of its proper divisors (40401992).

80803978 is a wasteful number, since it uses less digits than its factorization.

80803978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40401991.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 80803978 is about 8989.1032923201. The cubic root of 80803978 is about 432.3255612039.

The spelling of 80803978 in words is "eighty million, eight hundred three thousand, nine hundred seventy-eight".