961897 has 4 divisors (see below), whose sum is σ = 980100. Its totient is φ = 943696.

The previous prime is 961879. The next prime is 961927. The reversal of 961897 is 798169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798169 = 23 ⋅34703.

It can be written as a sum of positive squares in 2 ways, for example, as 484416 + 477481 = 696^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 961897 - 2⁷ = 961769 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961817) 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, 9022 + ... + 9127.

It is an arithmetic number, because the mean of its divisors is an integer number (245025).

2⁹⁶¹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

961897 is a deficient number, since it is larger than the sum of its proper divisors (18203).

961897 is a wasteful number, since it uses less digits than its factorization.

961897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202.

The product of its digits is 27216, while the sum is 40.

The square root of 961897 is about 980.7634781128. The cubic root of 961897 is about 98.7134180581.

The spelling of 961897 in words is "nine hundred sixty-one thousand, eight hundred ninety-seven".