83587649 has 2 divisors, whose sum is σ = 83587650. Its totient is φ = 83587648.

The previous prime is 83587639. The next prime is 83587663. The reversal of 83587649 is 94678538.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82719025 + 868624 = 9095^2 + 932^2 .

It is a cyclic number.

It is not a de Polignac number, because 83587649 - 2⁴ = 83587633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 83587597 and 83587606.

It is not a weakly prime, because it can be changed into another prime (83587639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41793824 + 41793825.

It is an arithmetic number, because the mean of its divisors is an integer number (41793825).

Almost surely, 2^83587649 is an apocalyptic number.

It is an amenable number.

83587649 is a deficient number, since it is larger than the sum of its proper divisors (1).

83587649 is an equidigital number, since it uses as much as digits as its factorization.

83587649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The square root of 83587649 is about 9142.6281232477. The cubic root of 83587649 is about 437.2341115288.

The spelling of 83587649 in words is "eighty-three million, five hundred eighty-seven thousand, six hundred forty-nine".