361773649 has 2 divisors, whose sum is σ = 361773650. Its totient is φ = 361773648.

The previous prime is 361773593. The next prime is 361773683. The reversal of 361773649 is 946377163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348083649 + 13690000 = 18657^2 + 3700^2 .

It is an emirp because it is prime and its reverse (946377163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 361773649 - 2¹⁷ = 361642577 is a prime.

It is a super-2 number, since 2×361773649² = 261760346221550402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 361773599 and 361773608.

It is not a weakly prime, because it can be changed into another prime (361773149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180886824 + 180886825.

It is an arithmetic number, because the mean of its divisors is an integer number (180886825).

Almost surely, 2^361773649 is an apocalyptic number.

It is an amenable number.

361773649 is a deficient number, since it is larger than the sum of its proper divisors (1).

361773649 is an equidigital number, since it uses as much as digits as its factorization.

361773649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 46.

The square root of 361773649 is about 19020.3482880835. The cubic root of 361773649 is about 712.5450216344.

The spelling of 361773649 in words is "three hundred sixty-one million, seven hundred seventy-three thousand, six hundred forty-nine".