84071381 has 4 divisors (see below), whose sum is σ = 84887712. Its totient is φ = 83255052.

The previous prime is 84071353. The next prime is 84071387. The reversal of 84071381 is 18317048.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84071381 - 2¹⁸ = 83809237 is a prime.

It is a super-2 number, since 2×84071381² = 14135994206494322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84071387) 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 3 ways as a sum of consecutive naturals, for example, 408011 + ... + 408216.

It is an arithmetic number, because the mean of its divisors is an integer number (21221928).

Almost surely, 2^84071381 is an apocalyptic number.

It is an amenable number.

84071381 is a deficient number, since it is larger than the sum of its proper divisors (816331).

84071381 is a wasteful number, since it uses less digits than its factorization.

84071381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816330.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 84071381 is about 9169.0447157815. The cubic root of 84071381 is about 438.0759322217.

The spelling of 84071381 in words is "eighty-four million, seventy-one thousand, three hundred eighty-one".