84029391 has 12 divisors (see below), whose sum is σ = 123366360. Its totient is φ = 55100880.

The previous prime is 84029389. The next prime is 84029411. The reversal of 84029391 is 19392048.

It is not a de Polignac number, because 84029391 - 2¹ = 84029389 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84029311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75981 + ... + 77078.

It is an arithmetic number, because the mean of its divisors is an integer number (10280530).

Almost surely, 2^84029391 is an apocalyptic number.

84029391 is a deficient number, since it is larger than the sum of its proper divisors (39336969).

84029391 is a wasteful number, since it uses less digits than its factorization.

84029391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153126 (or 153123 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 84029391 is about 9166.7546601837. The cubic root of 84029391 is about 438.0029867814.

The spelling of 84029391 in words is "eighty-four million, twenty-nine thousand, three hundred ninety-one".