86823949 has 2 divisors, whose sum is σ = 86823950. Its totient is φ = 86823948.

The previous prime is 86823917. The next prime is 86823991. The reversal of 86823949 is 94932868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62252100 + 24571849 = 7890^2 + 4957^2 .

It is a cyclic number.

It is not a de Polignac number, because 86823949 - 2⁵ = 86823917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86820949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43411974 + 43411975.

It is an arithmetic number, because the mean of its divisors is an integer number (43411975).

Almost surely, 2^86823949 is an apocalyptic number.

It is an amenable number.

86823949 is a deficient number, since it is larger than the sum of its proper divisors (1).

86823949 is an equidigital number, since it uses as much as digits as its factorization.

86823949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 49.

The square root of 86823949 is about 9317.9369497760. The cubic root of 86823949 is about 442.8056751396.

The spelling of 86823949 in words is "eighty-six million, eight hundred twenty-three thousand, nine hundred forty-nine".