1961009107 has 2 divisors, whose sum is σ = 1961009108. Its totient is φ = 1961009106.

The previous prime is 1961009027. The next prime is 1961009111. The reversal of 1961009107 is 7019001691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961009107 is a prime.

It is a super-3 number, since 3×1961009107³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1961009207) 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 as a sum of consecutive naturals, namely, 980504553 + 980504554.

It is an arithmetic number, because the mean of its divisors is an integer number (980504554).

Almost surely, 2^1961009107 is an apocalyptic number.

1961009107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961009107 is an equidigital number, since it uses as much as digits as its factorization.

1961009107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 1961009107 is about 44283.2824777026. The cubic root of 1961009107 is about 1251.6796847430.

The spelling of 1961009107 in words is "one billion, nine hundred sixty-one million, nine thousand, one hundred seven".