961961243 has 6 divisors (see below), whose sum is σ = 967338252. Its totient is φ = 956613960.

The previous prime is 961961239. The next prime is 961961251. The reversal of 961961243 is 342169169.

It is not a de Polignac number, because 961961243 - 2² = 961961239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 961961243.

It is not an unprimeable number, because it can be changed into a prime (961967243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18080 + ... + 47442.

It is an arithmetic number, because the mean of its divisors is an integer number (161223042).

Almost surely, 2^961961243 is an apocalyptic number.

961961243 is a deficient number, since it is larger than the sum of its proper divisors (5377009).

961961243 is an equidigital number, since it uses as much as digits as its factorization.

961961243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29725 (or 29544 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 961961243 is about 31015.5000443327. The cubic root of 961961243 is about 987.1561562702.

The spelling of 961961243 in words is "nine hundred sixty-one million, nine hundred sixty-one thousand, two hundred forty-three".