961577 has 4 divisors (see below), whose sum is σ = 963540. Its totient is φ = 959616.

The previous prime is 961567. The next prime is 961601. The reversal of 961577 is 775169.

961577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 775169 = 23 ⋅33703.

It can be written as a sum of positive squares in 2 ways, for example, as 346921 + 614656 = 589^2 + 784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961507) 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, 449 + ... + 1457.

It is an arithmetic number, because the mean of its divisors is an integer number (240885).

2⁹⁶¹⁵⁷⁷ is an apocalyptic number.

It is an amenable number.

961577 is a deficient number, since it is larger than the sum of its proper divisors (1963).

961577 is a wasteful number, since it uses less digits than its factorization.

961577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962.

The product of its digits is 13230, while the sum is 35.

The square root of 961577 is about 980.6003263308. The cubic root of 961577 is about 98.7024703172.

The spelling of 961577 in words is "nine hundred sixty-one thousand, five hundred seventy-seven".