813487625 has 8 divisors (see below), whose sum is σ = 1015232712. Its totient is φ = 650790000.

The previous prime is 813487607. The next prime is 813487627. The reversal of 813487625 is 526784318.

It can be written as a sum of positive squares in 4 ways, for example, as 212110096 + 601377529 = 14564^2 + 24523^2 .

It is a de Polignac number, because none of the positive numbers 2^k-813487625 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813487627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3253826 + ... + 3254075.

It is an arithmetic number, because the mean of its divisors is an integer number (126904089).

Almost surely, 2^813487625 is an apocalyptic number.

It is an amenable number.

813487625 is a deficient number, since it is larger than the sum of its proper divisors (201745087).

813487625 is an equidigital number, since it uses as much as digits as its factorization.

813487625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6507916 (or 6507906 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 813487625 is about 28521.7044546780. The cubic root of 813487625 is about 933.5057203548.

It can be divided in two parts, 8134 and 87625, that added together give a palindrome (95759).

The spelling of 813487625 in words is "eight hundred thirteen million, four hundred eighty-seven thousand, six hundred twenty-five".