80851679 has 2 divisors, whose sum is σ = 80851680. Its totient is φ = 80851678.

The previous prime is 80851651. The next prime is 80851709. The reversal of 80851679 is 97615808.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80851679 - 2¹² = 80847583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80851579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40425839 + 40425840.

It is an arithmetic number, because the mean of its divisors is an integer number (40425840).

Almost surely, 2^80851679 is an apocalyptic number.

80851679 is a deficient number, since it is larger than the sum of its proper divisors (1).

80851679 is an equidigital number, since it uses as much as digits as its factorization.

80851679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 80851679 is about 8991.7561688471. The cubic root of 80851679 is about 432.4106160301.

The spelling of 80851679 in words is "eighty million, eight hundred fifty-one thousand, six hundred seventy-nine".