84731407 has 2 divisors, whose sum is σ = 84731408. Its totient is φ = 84731406.

The previous prime is 84731399. The next prime is 84731429. The reversal of 84731407 is 70413748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84731407 - 2³ = 84731399 is a prime.

It is a super-2 number, since 2×84731407² = 14358822664399298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84731447) 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 as a sum of consecutive naturals, namely, 42365703 + 42365704.

It is an arithmetic number, because the mean of its divisors is an integer number (42365704).

Almost surely, 2^84731407 is an apocalyptic number.

84731407 is a deficient number, since it is larger than the sum of its proper divisors (1).

84731407 is an equidigital number, since it uses as much as digits as its factorization.

84731407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 84731407 is about 9204.9664312261. The cubic root of 84731407 is about 439.2193578942.

The spelling of 84731407 in words is "eighty-four million, seven hundred thirty-one thousand, four hundred seven".