84156387 has 8 divisors (see below), whose sum is σ = 128238336. Its totient is φ = 48089352.

The previous prime is 84156383. The next prime is 84156407. The reversal of 84156387 is 78365148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84156387 - 2² = 84156383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84156383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2003703 + ... + 2003744.

It is an arithmetic number, because the mean of its divisors is an integer number (16029792).

Almost surely, 2^84156387 is an apocalyptic number.

84156387 is a deficient number, since it is larger than the sum of its proper divisors (44081949).

84156387 is a wasteful number, since it uses less digits than its factorization.

84156387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007457.

The product of its digits is 161280, while the sum is 42.

The square root of 84156387 is about 9173.6790329725. The cubic root of 84156387 is about 438.2235311560.

The spelling of 84156387 in words is "eighty-four million, one hundred fifty-six thousand, three hundred eighty-seven".