80859949 has 2 divisors, whose sum is σ = 80859950. Its totient is φ = 80859948.

The previous prime is 80859941. The next prime is 80859967. The reversal of 80859949 is 94995808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73650724 + 7209225 = 8582^2 + 2685^2 .

It is a cyclic number.

It is not a de Polignac number, because 80859949 - 2³ = 80859941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80859896 and 80859905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80859941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40429974 + 40429975.

It is an arithmetic number, because the mean of its divisors is an integer number (40429975).

Almost surely, 2^80859949 is an apocalyptic number.

It is an amenable number.

80859949 is a deficient number, since it is larger than the sum of its proper divisors (1).

80859949 is an equidigital number, since it uses as much as digits as its factorization.

80859949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 52.

The square root of 80859949 is about 8992.2160227610. The cubic root of 80859949 is about 432.4253587208.

The spelling of 80859949 in words is "eighty million, eight hundred fifty-nine thousand, nine hundred forty-nine".