961549 has 2 divisors, whose sum is σ = 961550. Its totient is φ = 961548.

The previous prime is 961547. The next prime is 961567. The reversal of 961549 is 945169.

961549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 59049 = 950^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 961549 - 2¹ = 961547 is a prime.

Together with 961547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480774 + 480775.

It is an arithmetic number, because the mean of its divisors is an integer number (480775).

2⁹⁶¹⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

961549 is a deficient number, since it is larger than the sum of its proper divisors (1).

961549 is an equidigital number, since it uses as much as digits as its factorization.

961549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 34.

The square root of 961549 is about 980.5860492583. The cubic root of 961549 is about 98.7015122743.

The spelling of 961549 in words is "nine hundred sixty-one thousand, five hundred forty-nine".