86138787 has 16 divisors (see below), whose sum is σ = 135786240. Its totient is φ = 47524512.

The previous prime is 86138783. The next prime is 86138791. The reversal of 86138787 is 78783168.

It is an interprime number because it is at equal distance from previous prime (86138783) and next prime (86138791).

It is not a de Polignac number, because 86138787 - 2² = 86138783 is a prime.

86138787 is a modest number, since divided by 8787 gives 8613 as remainder.

It is not an unprimeable number, because it can be changed into a prime (86138783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70113 + ... + 71330.

It is an arithmetic number, because the mean of its divisors is an integer number (8486640).

Almost surely, 2^86138787 is an apocalyptic number.

86138787 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

86138787 is a deficient number, since it is larger than the sum of its proper divisors (49647453).

86138787 is a wasteful number, since it uses less digits than its factorization.

86138787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141482.

The product of its digits is 451584, while the sum is 48.

The square root of 86138787 is about 9281.0983724988. The cubic root of 86138787 is about 441.6378130116.

The spelling of 86138787 in words is "eighty-six million, one hundred thirty-eight thousand, seven hundred eighty-seven".