86982949 has 2 divisors, whose sum is σ = 86982950. Its totient is φ = 86982948.

The previous prime is 86982943. The next prime is 86982979. The reversal of 86982949 is 94928968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70862724 + 16120225 = 8418^2 + 4015^2 .

It is a cyclic number.

It is not a de Polignac number, because 86982949 - 2¹³ = 86974757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86982949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86982943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43491474 + 43491475.

It is an arithmetic number, because the mean of its divisors is an integer number (43491475).

Almost surely, 2^86982949 is an apocalyptic number.

It is an amenable number.

86982949 is a deficient number, since it is larger than the sum of its proper divisors (1).

86982949 is an equidigital number, since it uses as much as digits as its factorization.

86982949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 55.

The square root of 86982949 is about 9326.4649787580. The cubic root of 86982949 is about 443.0758124646.

The spelling of 86982949 in words is "eighty-six million, nine hundred eighty-two thousand, nine hundred forty-nine".