83474391 has 108 divisors (see below), whose sum is σ = 161748216. Its totient is φ = 37920960.

The previous prime is 83474389. The next prime is 83474399. The reversal of 83474391 is 19347438.

It is not a de Polignac number, because 83474391 - 2¹ = 83474389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83474399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 4393380 + ... + 4393398.

Almost surely, 2^83474391 is an apocalyptic number.

83474391 is a deficient number, since it is larger than the sum of its proper divisors (78273825).

83474391 is a wasteful number, since it uses less digits than its factorization.

83474391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 53 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 83474391 is about 9136.4320716569. The cubic root of 83474391 is about 437.0365438879.

Multiplying 83474391 by its sum of digits (39), we get a square (3255501249 = 57057²).

83474391 divided by its sum of digits (39) gives a square (2140369 = 1463²).

It can be divided in two parts, 83 and 474391, that added together give a palindrome (474474).

The spelling of 83474391 in words is "eighty-three million, four hundred seventy-four thousand, three hundred ninety-one".