86974213 has 2 divisors, whose sum is σ = 86974214. Its totient is φ = 86974212.

The previous prime is 86974211. The next prime is 86974291. The reversal of 86974213 is 31247968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86899684 + 74529 = 9322^2 + 273^2 .

It is a cyclic number.

It is not a de Polignac number, because 86974213 - 2¹ = 86974211 is a prime.

Together with 86974211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86974211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43487106 + 43487107.

It is an arithmetic number, because the mean of its divisors is an integer number (43487107).

Almost surely, 2^86974213 is an apocalyptic number.

It is an amenable number.

86974213 is a deficient number, since it is larger than the sum of its proper divisors (1).

86974213 is an equidigital number, since it uses as much as digits as its factorization.

86974213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 86974213 is about 9325.9966223455. The cubic root of 86974213 is about 443.0609787532.

The spelling of 86974213 in words is "eighty-six million, nine hundred seventy-four thousand, two hundred thirteen".