961545169 has 4 divisors (see below), whose sum is σ = 1035510196. Its totient is φ = 887580144.

The previous prime is 961545163. The next prime is 961545173.

It is a happy number.

961545169 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 188705169 + 772840000 = 13737^2 + 27800^2 .

It is a cyclic number.

It is not a de Polignac number, because 961545169 - 2¹³ = 961536977 is a prime.

It is a super-2 number, since 2×961545169² = 1849138224054477122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961545163) 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, 36982494 + ... + 36982519.

It is an arithmetic number, because the mean of its divisors is an integer number (258877549).

Almost surely, 2^961545169 is an apocalyptic number.

It is an amenable number.

961545169 is a deficient number, since it is larger than the sum of its proper divisors (73965027).

961545169 is a wasteful number, since it uses less digits than its factorization.

961545169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73965026.

The product of its digits is 291600, while the sum is 46.

The square root of 961545169 is about 31008.7918016810. The cubic root of 961545169 is about 987.0138119208.

The spelling of 961545169 in words is "nine hundred sixty-one million, five hundred forty-five thousand, one hundred sixty-nine".