86650381 has 2 divisors, whose sum is σ = 86650382. Its totient is φ = 86650380.

The previous prime is 86650379. The next prime is 86650387. The reversal of 86650381 is 18305668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56025225 + 30625156 = 7485^2 + 5534^2 .

It is a cyclic number.

It is not a de Polignac number, because 86650381 - 2¹ = 86650379 is a prime.

It is a super-2 number, since 2×86650381² = 15016577054890322, which contains 22 as substring.

Together with 86650379, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 86650381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86650387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43325190 + 43325191.

It is an arithmetic number, because the mean of its divisors is an integer number (43325191).

Almost surely, 2^86650381 is an apocalyptic number.

It is an amenable number.

86650381 is a deficient number, since it is larger than the sum of its proper divisors (1).

86650381 is an equidigital number, since it uses as much as digits as its factorization.

86650381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 86650381 is about 9308.6186408081. The cubic root of 86650381 is about 442.5104103438.

The spelling of 86650381 in words is "eighty-six million, six hundred fifty thousand, three hundred eighty-one".