86924021 has 2 divisors, whose sum is σ = 86924022. Its totient is φ = 86924020.

The previous prime is 86924003. The next prime is 86924041. The reversal of 86924021 is 12042968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51984100 + 34939921 = 7210^2 + 5911^2 .

It is a cyclic number.

It is not a de Polignac number, because 86924021 - 2⁶ = 86923957 is a prime.

It is a super-3 number, since 3×86924021³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is equal to p_5049059 and since 86924021 and 5049059 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86924041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43462010 + 43462011.

It is an arithmetic number, because the mean of its divisors is an integer number (43462011).

Almost surely, 2^86924021 is an apocalyptic number.

It is an amenable number.

86924021 is a deficient number, since it is larger than the sum of its proper divisors (1).

86924021 is an equidigital number, since it uses as much as digits as its factorization.

86924021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 86924021 is about 9323.3052615475. The cubic root of 86924021 is about 442.9757335790.

Adding to 86924021 its reverse (12042968), we get a palindrome (98966989).

The spelling of 86924021 in words is "eighty-six million, nine hundred twenty-four thousand, twenty-one".