80717749 has 24 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 67281984.

The previous prime is 80717743. The next prime is 80717761. The reversal of 80717749 is 94771708.

It is not a de Polignac number, because 80717749 - 2¹⁷ = 80586677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80717743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361852 + ... + 362074.

It is an arithmetic number, because the mean of its divisors is an integer number (4021920).

Almost surely, 2^80717749 is an apocalyptic number.

80717749 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

80717749 is a deficient number, since it is larger than the sum of its proper divisors (15808331).

80717749 is a wasteful number, since it uses less digits than its factorization.

80717749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 80717749 is about 8984.3057049502. The cubic root of 80717749 is about 432.1717227823.

The spelling of 80717749 in words is "eighty million, seven hundred seventeen thousand, seven hundred forty-nine".