361487821 has 2 divisors, whose sum is σ = 361487822. Its totient is φ = 361487820.

The previous prime is 361487801. The next prime is 361487827. The reversal of 361487821 is 128784163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275925321 + 85562500 = 16611^2 + 9250^2 .

It is a cyclic number.

It is not a de Polignac number, because 361487821 - 2¹⁵ = 361455053 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 (361487827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180743910 + 180743911.

It is an arithmetic number, because the mean of its divisors is an integer number (180743911).

Almost surely, 2^361487821 is an apocalyptic number.

It is an amenable number.

361487821 is a deficient number, since it is larger than the sum of its proper divisors (1).

361487821 is an equidigital number, since it uses as much as digits as its factorization.

361487821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 361487821 is about 19012.8330608566. The cubic root of 361487821 is about 712.3573177304.

The spelling of 361487821 in words is "three hundred sixty-one million, four hundred eighty-seven thousand, eight hundred twenty-one".