83780625 has 20 divisors (see below), whose sum is σ = 139592816. Its totient is φ = 44682000.

The previous prime is 83780621. The next prime is 83780663. The reversal of 83780625 is 52608738.

It is not a de Polignac number, because 83780625 - 2² = 83780621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83780621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20467 + ... + 24216.

Almost surely, 2^83780625 is an apocalyptic number.

It is an amenable number.

83780625 is a deficient number, since it is larger than the sum of its proper divisors (55812191).

83780625 is an equidigital number, since it uses as much as digits as its factorization.

83780625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44706 (or 44691 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 83780625 is about 9153.1756784189. The cubic root of 83780625 is about 437.5703288300.

The spelling of 83780625 in words is "eighty-three million, seven hundred eighty thousand, six hundred twenty-five".