361964891 has 4 divisors (see below), whose sum is σ = 362019312. Its totient is φ = 361910472.

The previous prime is 361964861. The next prime is 361964899. The reversal of 361964891 is 198469163.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-361964891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (361964899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15575 + ... + 31088.

It is an arithmetic number, because the mean of its divisors is an integer number (90504828).

Almost surely, 2^361964891 is an apocalyptic number.

361964891 is a deficient number, since it is larger than the sum of its proper divisors (54421).

361964891 is an equidigital number, since it uses as much as digits as its factorization.

361964891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54420.

The product of its digits is 279936, while the sum is 47.

The square root of 361964891 is about 19025.3749240324. The cubic root of 361964891 is about 712.6705554969.

The spelling of 361964891 in words is "three hundred sixty-one million, nine hundred sixty-four thousand, eight hundred ninety-one".