7138947087 has 6 divisors (see below), whose sum is σ = 10311812472. Its totient is φ = 4759298052.

The previous prime is 7138947073. The next prime is 7138947091. The reversal of 7138947087 is 7807498317.

7138947087 is a `hidden beast` number, since 7 + 13 + 89 + 470 + 87 = 666.

It is not a de Polignac number, because 7138947087 - 2¹⁰ = 7138946063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138947097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396608163 + ... + 396608180.

It is an arithmetic number, because the mean of its divisors is an integer number (1718635412).

Almost surely, 2^7138947087 is an apocalyptic number.

7138947087 is a deficient number, since it is larger than the sum of its proper divisors (3172865385).

7138947087 is a wasteful number, since it uses less digits than its factorization.

7138947087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793216349 (or 793216346 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The square root of 7138947087 is about 84492.2901038905. The cubic root of 7138947087 is about 1925.5053117250.

The spelling of 7138947087 in words is "seven billion, one hundred thirty-eight million, nine hundred forty-seven thousand, eighty-seven".