80649321 has 16 divisors (see below), whose sum is σ = 113369088. Its totient is φ = 50922000.

The previous prime is 80649301. The next prime is 80649341. The reversal of 80649321 is 12394608.

It is an interprime number because it is at equal distance from previous prime (80649301) and next prime (80649341).

It is not a de Polignac number, because 80649321 - 2²¹ = 78552169 is a prime.

It is a super-2 number, since 2×80649321² = 13008625955522082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80649301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4855 + ... + 13596.

It is an arithmetic number, because the mean of its divisors is an integer number (7085568).

Almost surely, 2^80649321 is an apocalyptic number.

It is an amenable number.

80649321 is a deficient number, since it is larger than the sum of its proper divisors (32719767).

80649321 is a wasteful number, since it uses less digits than its factorization.

80649321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18532.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 80649321 is about 8980.4967011853. The cubic root of 80649321 is about 432.0495645720.

The spelling of 80649321 in words is "eighty million, six hundred forty-nine thousand, three hundred twenty-one".