80769949 has 4 divisors (see below), whose sum is σ = 86983036. Its totient is φ = 74556864.

The previous prime is 80769943. The next prime is 80769967. The reversal of 80769949 is 94996708.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46172025 + 34597924 = 6795^2 + 5882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80769949 is a prime.

It is a super-2 number, since 2×80769949² = 13047569322925202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80769896 and 80769905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80769943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3106524 + ... + 3106549.

It is an arithmetic number, because the mean of its divisors is an integer number (21745759).

Almost surely, 2^80769949 is an apocalyptic number.

It is an amenable number.

80769949 is a deficient number, since it is larger than the sum of its proper divisors (6213087).

80769949 is a wasteful number, since it uses less digits than its factorization.

80769949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213086.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 80769949 is about 8987.2103013115. The cubic root of 80769949 is about 432.2648642244.

It can be divided in two parts, 80769 and 949, that added together give a palindrome (81718).

The spelling of 80769949 in words is "eighty million, seven hundred sixty-nine thousand, nine hundred forty-nine".