84203491 has 4 divisors (see below), whose sum is σ = 84311272. Its totient is φ = 84095712.

The previous prime is 84203479. The next prime is 84203507. The reversal of 84203491 is 19430248.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84203491 - 2¹⁷ = 84072419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84203411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52710 + ... + 54283.

It is an arithmetic number, because the mean of its divisors is an integer number (21077818).

Almost surely, 2^84203491 is an apocalyptic number.

84203491 is a deficient number, since it is larger than the sum of its proper divisors (107781).

84203491 is a wasteful number, since it uses less digits than its factorization.

84203491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107780.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 84203491 is about 9176.2460189339. The cubic root of 84203491 is about 438.3052767089.

It can be divided in two parts, 8420 and 3491, that added together give a palindrome (11911).

The spelling of 84203491 in words is "eighty-four million, two hundred three thousand, four hundred ninety-one".