80649235 has 4 divisors (see below), whose sum is σ = 96779088. Its totient is φ = 64519384.

The previous prime is 80649229. The next prime is 80649253. The reversal of 80649235 is 53294608.

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

It is a cyclic number.

It is not a de Polignac number, because 80649235 - 2²¹ = 78552083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80649194 and 80649203.

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 in 3 ways as a sum of consecutive naturals, for example, 8064919 + ... + 8064928.

It is an arithmetic number, because the mean of its divisors is an integer number (24194772).

Almost surely, 2^80649235 is an apocalyptic number.

80649235 is a deficient number, since it is larger than the sum of its proper divisors (16129853).

80649235 is a wasteful number, since it uses less digits than its factorization.

80649235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16129852.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 80649235 is about 8980.4919130302. The cubic root of 80649235 is about 432.0494110007.

The spelling of 80649235 in words is "eighty million, six hundred forty-nine thousand, two hundred thirty-five".