361541891 has 2 divisors, whose sum is σ = 361541892. Its totient is φ = 361541890.

The previous prime is 361541879. The next prime is 361541903. The reversal of 361541891 is 198145163.

It is a balanced prime because it is at equal distance from previous prime (361541879) and next prime (361541903).

It is an emirp because it is prime and its reverse (198145163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 361541891 - 2⁶ = 361541827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (361541821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180770945 + 180770946.

It is an arithmetic number, because the mean of its divisors is an integer number (180770946).

Almost surely, 2^361541891 is an apocalyptic number.

361541891 is a deficient number, since it is larger than the sum of its proper divisors (1).

361541891 is an equidigital number, since it uses as much as digits as its factorization.

361541891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 361541891 is about 19014.2549420165. The cubic root of 361541891 is about 712.3928332099.

The spelling of 361541891 in words is "three hundred sixty-one million, five hundred forty-one thousand, eight hundred ninety-one".