86742019 has 32 divisors (see below), whose sum is σ = 111315456. Its totient is φ = 65767680.

The previous prime is 86742017. The next prime is 86742037. The reversal of 86742019 is 91024768.

It is a cyclic number.

It is not a de Polignac number, because 86742019 - 2¹ = 86742017 is a prime.

It is a super-2 number, since 2×86742019² = 15048355720392722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86742017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249804 + ... + 250150.

It is an arithmetic number, because the mean of its divisors is an integer number (3478608).

Almost surely, 2^86742019 is an apocalyptic number.

86742019 is a deficient number, since it is larger than the sum of its proper divisors (24573437).

86742019 is a wasteful number, since it uses less digits than its factorization.

86742019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 86742019 is about 9313.5395527157. The cubic root of 86742019 is about 442.6663491942. Note that the first 3 decimals are identical.

The spelling of 86742019 in words is "eighty-six million, seven hundred forty-two thousand, nineteen".