80039749 has 8 divisors (see below), whose sum is σ = 82114200. Its totient is φ = 77971200.

The previous prime is 80039711. The next prime is 80039753. The reversal of 80039749 is 94793008.

It can be written as a sum of positive squares in 4 ways, for example, as 62500 + 79977249 = 250^2 + 8943^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 80039749 - 2¹⁷ = 79908677 is a prime.

It is a super-2 number, since 2×80039749² = 12812722839966002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80039779) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 42079 + ... + 43939.

It is an arithmetic number, because the mean of its divisors is an integer number (10264275).

Almost surely, 2^80039749 is an apocalyptic number.

It is an amenable number.

80039749 is a deficient number, since it is larger than the sum of its proper divisors (2074451).

80039749 is a wasteful number, since it uses less digits than its factorization.

80039749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 80039749 is about 8946.4936707070. The cubic root of 80039749 is about 430.9582900440.

The spelling of 80039749 in words is "eighty million, thirty-nine thousand, seven hundred forty-nine".