8138947502 has 16 divisors (see below), whose sum is σ = 14686823040. Its totient is φ = 3304534968.

The previous prime is 8138947493. The next prime is 8138947511. The reversal of 8138947502 is 2057498318.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8138947493) and next prime (8138947511).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15298508 + ... + 15299039.

It is an arithmetic number, because the mean of its divisors is an integer number (917926440).

Almost surely, 2^8138947502 is an apocalyptic number.

8138947502 is a deficient number, since it is larger than the sum of its proper divisors (6547875538).

8138947502 is a wasteful number, since it uses less digits than its factorization.

8138947502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30597575.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 8138947502 is about 90216.1155337559. The cubic root of 8138947502 is about 2011.5125618050.

The spelling of 8138947502 in words is "eight billion, one hundred thirty-eight million, nine hundred forty-seven thousand, five hundred two".