961278319 has 4 divisors (see below), whose sum is σ = 967175896. Its totient is φ = 955380744.

The previous prime is 961278317. The next prime is 961278323. The reversal of 961278319 is 913872169.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 961278319 - 2¹ = 961278317 is a prime.

It is a super-2 number, since 2×961278319² = 1848112013158931522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961278317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2948544 + ... + 2948869.

It is an arithmetic number, because the mean of its divisors is an integer number (241793974).

Almost surely, 2^961278319 is an apocalyptic number.

961278319 is a deficient number, since it is larger than the sum of its proper divisors (5897577).

961278319 is a wasteful number, since it uses less digits than its factorization.

961278319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897576.

The product of its digits is 163296, while the sum is 46.

The square root of 961278319 is about 31004.4886911557. The cubic root of 961278319 is about 986.9224974362.

The spelling of 961278319 in words is "nine hundred sixty-one million, two hundred seventy-eight thousand, three hundred nineteen".