361211491 has 2 divisors, whose sum is σ = 361211492. Its totient is φ = 361211490.

The previous prime is 361211453. The next prime is 361211507. The reversal of 361211491 is 194112163.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 361211491 - 2¹³ = 361203299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (361212491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180605745 + 180605746.

It is an arithmetic number, because the mean of its divisors is an integer number (180605746).

Almost surely, 2^361211491 is an apocalyptic number.

361211491 is a deficient number, since it is larger than the sum of its proper divisors (1).

361211491 is an equidigital number, since it uses as much as digits as its factorization.

361211491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 361211491 is about 19005.5647377288. The cubic root of 361211491 is about 712.1757570937.

The spelling of 361211491 in words is "three hundred sixty-one million, two hundred eleven thousand, four hundred ninety-one".