820607925 has 24 divisors (see below), whose sum is σ = 1403526240. Its totient is φ = 422564800.

The previous prime is 820607923. The next prime is 820607927. The reversal of 820607925 is 529706028.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (820607923) and next prime (820607927).

It is not a de Polignac number, because 820607925 - 2¹ = 820607923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820607923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186471 + ... + 190820.

It is an arithmetic number, because the mean of its divisors is an integer number (58480260).

Almost surely, 2^820607925 is an apocalyptic number.

It is an amenable number.

820607925 is a deficient number, since it is larger than the sum of its proper divisors (582918315).

820607925 is a wasteful number, since it uses less digits than its factorization.

820607925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377333 (or 377328 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 820607925 is about 28646.2549908361. The cubic root of 820607925 is about 936.2214107941.

The spelling of 820607925 in words is "eight hundred twenty million, six hundred seven thousand, nine hundred twenty-five".