7487857813 has 4 divisors (see below), whose sum is σ = 7499503648. Its totient is φ = 7476211980.

The previous prime is 7487857697. The next prime is 7487857841. The reversal of 7487857813 is 3187587847.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3187587847 = 24023 ⋅132689.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7487857813 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 (7487854813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5821953 + ... + 5823238.

It is an arithmetic number, because the mean of its divisors is an integer number (1874875912).

Almost surely, 2^7487857813 is an apocalyptic number.

It is an amenable number.

7487857813 is a deficient number, since it is larger than the sum of its proper divisors (11645835).

7487857813 is a wasteful number, since it uses less digits than its factorization.

7487857813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11645834.

The product of its digits is 10536960, while the sum is 58.

The square root of 7487857813 is about 86532.4090326856. The cubic root of 7487857813 is about 1956.3769154622.

The spelling of 7487857813 in words is "seven billion, four hundred eighty-seven million, eight hundred fifty-seven thousand, eight hundred thirteen".