8387403725 has 12 divisors (see below), whose sum is σ = 10476300084. Its totient is φ = 6660942720.

The previous prime is 8387403697. The next prime is 8387403749. The reversal of 8387403725 is 5273047838.

It can be written as a sum of positive squares in 6 ways, for example, as 345439396 + 8041964329 = 18586^2 + 89677^2 .

It is not a de Polignac number, because 8387403725 - 2¹⁰ = 8387402701 is a prime.

It is a super-2 number, since 2×8387403725² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8387403725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1221014 + ... + 1227863.

It is an arithmetic number, because the mean of its divisors is an integer number (873025007).

Almost surely, 2^8387403725 is an apocalyptic number.

It is an amenable number.

8387403725 is a deficient number, since it is larger than the sum of its proper divisors (2088896359).

8387403725 is a wasteful number, since it uses less digits than its factorization.

8387403725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449024 (or 2449019 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The square root of 8387403725 is about 91582.7698041504. The cubic root of 8387403725 is about 2031.7761094339.

The spelling of 8387403725 in words is "eight billion, three hundred eighty-seven million, four hundred three thousand, seven hundred twenty-five".