361649 has 2 divisors, whose sum is σ = 361650. Its totient is φ = 361648.

The previous prime is 361643. The next prime is 361651. The reversal of 361649 is 946163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351649 + 10000 = 593^2 + 100^2 .

It is an emirp because it is prime and its reverse (946163) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-361649 is a prime.

Together with 361651, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 361649.

It is not a weakly prime, because it can be changed into another prime (361643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180824 + 180825.

It is an arithmetic number, because the mean of its divisors is an integer number (180825).

2³⁶¹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

361649 is a deficient number, since it is larger than the sum of its proper divisors (1).

361649 is an equidigital number, since it uses as much as digits as its factorization.

361649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 361649 is about 601.3725966487. The cubic root of 361649 is about 71.2463176511.

The spelling of 361649 in words is "three hundred sixty-one thousand, six hundred forty-nine".