84671131 has 2 divisors, whose sum is σ = 84671132. Its totient is φ = 84671130.

The previous prime is 84671107. The next prime is 84671141. The reversal of 84671131 is 13117648.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84671131 - 2⁷ = 84671003 is a prime.

It is a super-2 number, since 2×84671131² = 14338400849638322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84671093 and 84671102.

It is not a weakly prime, because it can be changed into another prime (84671141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42335565 + 42335566.

It is an arithmetic number, because the mean of its divisors is an integer number (42335566).

Almost surely, 2^84671131 is an apocalyptic number.

84671131 is a deficient number, since it is larger than the sum of its proper divisors (1).

84671131 is an equidigital number, since it uses as much as digits as its factorization.

84671131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 84671131 is about 9201.6917466301. The cubic root of 84671131 is about 439.1151829600.

Adding to 84671131 its reverse (13117648), we get a palindrome (97788779).

The spelling of 84671131 in words is "eighty-four million, six hundred seventy-one thousand, one hundred thirty-one".