80870501 has 2 divisors, whose sum is σ = 80870502. Its totient is φ = 80870500.

The previous prime is 80870497. The next prime is 80870509. The reversal of 80870501 is 10507808.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80013025 + 857476 = 8945^2 + 926^2 .

It is a cyclic number.

It is not a de Polignac number, because 80870501 - 2² = 80870497 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80870509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40435250 + 40435251.

It is an arithmetic number, because the mean of its divisors is an integer number (40435251).

Almost surely, 2^80870501 is an apocalyptic number.

It is an amenable number.

80870501 is a deficient number, since it is larger than the sum of its proper divisors (1).

80870501 is an equidigital number, since it uses as much as digits as its factorization.

80870501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 80870501 is about 8992.8027332973. The cubic root of 80870501 is about 432.4441680076. Note that the first 3 decimals are identical.

The spelling of 80870501 in words is "eighty million, eight hundred seventy thousand, five hundred one".