84664031 has 2 divisors, whose sum is σ = 84664032. Its totient is φ = 84664030.

The previous prime is 84664001. The next prime is 84664049. The reversal of 84664031 is 13046648.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84664031 - 2¹⁸ = 84401887 is a prime.

It is a super-2 number, since 2×84664031² = 14335996290337922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84664001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42332015 + 42332016.

It is an arithmetic number, because the mean of its divisors is an integer number (42332016).

Almost surely, 2^84664031 is an apocalyptic number.

84664031 is a deficient number, since it is larger than the sum of its proper divisors (1).

84664031 is an equidigital number, since it uses as much as digits as its factorization.

84664031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 84664031 is about 9201.3059399196. The cubic root of 84664031 is about 439.1029087845.

The spelling of 84664031 in words is "eighty-four million, six hundred sixty-four thousand, thirty-one".