84340431 has 12 divisors (see below), whose sum is σ = 139228752. Its totient is φ = 48194496.

The previous prime is 84340423. The next prime is 84340447. The reversal of 84340431 is 13404348.

It is not a de Polignac number, because 84340431 - 2³ = 84340423 is a prime.

It is a super-2 number, since 2×84340431² = 14226616602531522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84340395 and 84340404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84340631) 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, 669306 + ... + 669431.

It is an arithmetic number, because the mean of its divisors is an integer number (11602396).

Almost surely, 2^84340431 is an apocalyptic number.

84340431 is a deficient number, since it is larger than the sum of its proper divisors (54888321).

84340431 is a wasteful number, since it uses less digits than its factorization.

84340431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338750 (or 1338747 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 84340431 is about 9183.7046446410. The cubic root of 84340431 is about 438.5427530716.

Adding to 84340431 its reverse (13404348), we get a palindrome (97744779).

The spelling of 84340431 in words is "eighty-four million, three hundred forty thousand, four hundred thirty-one".