80634409 has 2 divisors, whose sum is σ = 80634410. Its totient is φ = 80634408.

The previous prime is 80634403. The next prime is 80634419. The reversal of 80634409 is 90443608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74874409 + 5760000 = 8653^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 80634409 - 2³ = 80634401 is a prime.

It is not a weakly prime, because it can be changed into another prime (80634401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40317204 + 40317205.

It is an arithmetic number, because the mean of its divisors is an integer number (40317205).

Almost surely, 2^80634409 is an apocalyptic number.

It is an amenable number.

80634409 is a deficient number, since it is larger than the sum of its proper divisors (1).

80634409 is an equidigital number, since it uses as much as digits as its factorization.

80634409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 80634409 is about 8979.6664191940. Note that the first 3 decimals coincide. The cubic root of 80634409 is about 432.0229343820.

The spelling of 80634409 in words is "eighty million, six hundred thirty-four thousand, four hundred nine".