1961000939 has 4 divisors (see below), whose sum is σ = 2006605656. Its totient is φ = 1915396224.

The previous prime is 1961000927. The next prime is 1961000959. The reversal of 1961000939 is 9390001691.

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 1961000939 - 2⁸ = 1961000683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961000959) 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, 22802294 + ... + 22802379.

It is an arithmetic number, because the mean of its divisors is an integer number (501651414).

Almost surely, 2^1961000939 is an apocalyptic number.

1961000939 is a deficient number, since it is larger than the sum of its proper divisors (45604717).

1961000939 is an equidigital number, since it uses as much as digits as its factorization.

1961000939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45604716.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 1961000939 is about 44283.1902531875. The cubic root of 1961000939 is about 1251.6779469075.

The spelling of 1961000939 in words is "one billion, nine hundred sixty-one million, nine hundred thirty-nine", and thus it is an aban number.