961673281 has 8 divisors (see below), whose sum is σ = 969455520. Its totient is φ = 953902368.

The previous prime is 961673233. The next prime is 961673303. The reversal of 961673281 is 182376169.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 961673281 - 2²¹ = 959576129 is a prime.

It is a super-2 number, since 2×961673281² = 1849630998778609922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961673231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269350 + ... + 272896.

It is an arithmetic number, because the mean of its divisors is an integer number (121181940).

Almost surely, 2^961673281 is an apocalyptic number.

It is an amenable number.

961673281 is a deficient number, since it is larger than the sum of its proper divisors (7782239).

961673281 is a wasteful number, since it uses less digits than its factorization.

961673281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5663.

The product of its digits is 108864, while the sum is 43.

The square root of 961673281 is about 31010.8574696025. The cubic root of 961673281 is about 987.0576450837.

The spelling of 961673281 in words is "nine hundred sixty-one million, six hundred seventy-three thousand, two hundred eighty-one".