80699121 has 6 divisors (see below), whose sum is σ = 116565410. Its totient is φ = 53799408.

The previous prime is 80699117. The next prime is 80699123. The reversal of 80699121 is 12199608.

It can be written as a sum of positive squares in only one way, i.e., 53450721 + 27248400 = 7311^2 + 5220^2 .

It is not a de Polignac number, because 80699121 - 2² = 80699117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80699123) 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 5 ways as a sum of consecutive naturals, for example, 4483276 + ... + 4483293.

Almost surely, 2^80699121 is an apocalyptic number.

It is an amenable number.

80699121 is a deficient number, since it is larger than the sum of its proper divisors (35866289).

80699121 is a wasteful number, since it uses less digits than its factorization.

80699121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8966575 (or 8966572 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 80699121 is about 8983.2689484396. The cubic root of 80699121 is about 432.1384747696.

The spelling of 80699121 in words is "eighty million, six hundred ninety-nine thousand, one hundred twenty-one".