84137479 has 2 divisors, whose sum is σ = 84137480. Its totient is φ = 84137478.

The previous prime is 84137467. The next prime is 84137527. The reversal of 84137479 is 97473148.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84137479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84137429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42068739 + 42068740.

It is an arithmetic number, because the mean of its divisors is an integer number (42068740).

Almost surely, 2^84137479 is an apocalyptic number.

84137479 is a deficient number, since it is larger than the sum of its proper divisors (1).

84137479 is an equidigital number, since it uses as much as digits as its factorization.

84137479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 84137479 is about 9172.6484179870. The cubic root of 84137479 is about 438.1907091229.

The spelling of 84137479 in words is "eighty-four million, one hundred thirty-seven thousand, four hundred seventy-nine".