1961907799 has 2 divisors, whose sum is σ = 1961907800. Its totient is φ = 1961907798.

The previous prime is 1961907749. The next prime is 1961907823. The reversal of 1961907799 is 9977091691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1961907799 - 2⁷ = 1961907671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961907749) 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 as a sum of consecutive naturals, namely, 980953899 + 980953900.

It is an arithmetic number, because the mean of its divisors is an integer number (980953900).

Almost surely, 2^1961907799 is an apocalyptic number.

1961907799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961907799 is an equidigital number, since it uses as much as digits as its factorization.

1961907799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1928934, while the sum is 58.

The square root of 1961907799 is about 44293.4283951920. The cubic root of 1961907799 is about 1251.8708622891.

The spelling of 1961907799 in words is "one billion, nine hundred sixty-one million, nine hundred seven thousand, seven hundred ninety-nine".