80637925 has 6 divisors (see below), whose sum is σ = 99991058. Its totient is φ = 64510320.

The previous prime is 80637923. The next prime is 80637929. The reversal of 80637925 is 52973608.

It can be written as a sum of positive squares in 3 ways, for example, as 21178404 + 59459521 = 4602^2 + 7711^2 .

It is not a de Polignac number, because 80637925 - 2¹ = 80637923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80637923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1612734 + ... + 1612783.

Almost surely, 2^80637925 is an apocalyptic number.

It is an amenable number.

80637925 is a deficient number, since it is larger than the sum of its proper divisors (19353133).

80637925 is a wasteful number, since it uses less digits than its factorization.

80637925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225527 (or 3225522 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 80637925 is about 8979.8621927065. The cubic root of 80637925 is about 432.0292136308.

It can be divided in two parts, 806379 and 25, that added together give a square (806404 = 898²).

The spelling of 80637925 in words is "eighty million, six hundred thirty-seven thousand, nine hundred twenty-five".