361897 has 4 divisors (see below), whose sum is σ = 371716. Its totient is φ = 352080.

The previous prime is 361877. The next prime is 361901. The reversal of 361897 is 798163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798163 = 349 ⋅2287.

It can be written as a sum of positive squares in 2 ways, for example, as 249001 + 112896 = 499^2 + 336^2 .

It is a cyclic number.

It is not a de Polignac number, because 361897 - 2⁷ = 361769 is a prime.

It is an Ulam number.

It is a Duffinian number.

361897 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (361807) 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, 4854 + ... + 4927.

It is an arithmetic number, because the mean of its divisors is an integer number (92929).

2³⁶¹⁸⁹⁷ is an apocalyptic number.

361897 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

361897 is a deficient number, since it is larger than the sum of its proper divisors (9819).

361897 is an equidigital number, since it uses as much as digits as its factorization.

361897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9818.

The product of its digits is 9072, while the sum is 34.

The square root of 361897 is about 601.5787562739. The cubic root of 361897 is about 71.2625995980.

The spelling of 361897 in words is "three hundred sixty-one thousand, eight hundred ninety-seven".