84137531 has 2 divisors, whose sum is σ = 84137532. Its totient is φ = 84137530.

The previous prime is 84137527. The next prime is 84137561. The reversal of 84137531 is 13573148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84137531 - 2² = 84137527 is a prime.

It is a super-2 number, since 2×84137531² = 14158248245551922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84137561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42068765 + 42068766.

It is an arithmetic number, because the mean of its divisors is an integer number (42068766).

Almost surely, 2^84137531 is an apocalyptic number.

84137531 is a deficient number, since it is larger than the sum of its proper divisors (1).

84137531 is an equidigital number, since it uses as much as digits as its factorization.

84137531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 84137531 is about 9172.6512525006. The cubic root of 84137531 is about 438.1907993954.

The spelling of 84137531 in words is "eighty-four million, one hundred thirty-seven thousand, five hundred thirty-one".