80725949 has 2 divisors, whose sum is σ = 80725950. Its totient is φ = 80725948.

The previous prime is 80725933. The next prime is 80725969. The reversal of 80725949 is 94952708.

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., 78889924 + 1836025 = 8882^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 80725949 - 2⁴ = 80725933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80725919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40362974 + 40362975.

It is an arithmetic number, because the mean of its divisors is an integer number (40362975).

Almost surely, 2^80725949 is an apocalyptic number.

It is an amenable number.

80725949 is a deficient number, since it is larger than the sum of its proper divisors (1).

80725949 is an equidigital number, since it uses as much as digits as its factorization.

80725949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 80725949 is about 8984.7620447066. The cubic root of 80725949 is about 432.1863568546.

The spelling of 80725949 in words is "eighty million, seven hundred twenty-five thousand, nine hundred forty-nine".