84670031 has 2 divisors, whose sum is σ = 84670032. Its totient is φ = 84670030.

The previous prime is 84670007. The next prime is 84670037. The reversal of 84670031 is 13007648.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84670031 - 2¹⁸ = 84407887 is a prime.

It is a super-2 number, since 2×84670031² = 14338028299081922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84669976 and 84670003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84670037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42335015 + 42335016.

It is an arithmetic number, because the mean of its divisors is an integer number (42335016).

Almost surely, 2^84670031 is an apocalyptic number.

84670031 is a deficient number, since it is larger than the sum of its proper divisors (1).

84670031 is an equidigital number, since it uses as much as digits as its factorization.

84670031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 84670031 is about 9201.6319748184. The cubic root of 84670031 is about 439.1132813721.

Adding to 84670031 its reverse (13007648), we get a palindrome (97677679).

The spelling of 84670031 in words is "eighty-four million, six hundred seventy thousand, thirty-one".