80723825 has 72 divisors (see below), whose sum is σ = 129726072. Its totient is φ = 49351680.

The previous prime is 80723821. The next prime is 80723827. The reversal of 80723825 is 52832708.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 15808576 + 64915249 = 3976^2 + 8057^2 .

It is not a de Polignac number, because 80723825 - 2² = 80723821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80723821) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 589157 + ... + 589293.

It is an arithmetic number, because the mean of its divisors is an integer number (1801751).

Almost surely, 2^80723825 is an apocalyptic number.

It is an amenable number.

80723825 is a deficient number, since it is larger than the sum of its proper divisors (49002247).

80723825 is a wasteful number, since it uses less digits than its factorization.

80723825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 80723825 is about 8984.6438438037. The cubic root of 80723825 is about 432.1825663681.

The spelling of 80723825 in words is "eighty million, seven hundred twenty-three thousand, eight hundred twenty-five".