1969920013 has 2 divisors, whose sum is σ = 1969920014. Its totient is φ = 1969920012.

The previous prime is 1969919983. The next prime is 1969920023. The reversal of 1969920013 is 3100299691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1964528329 + 5391684 = 44323^2 + 2322^2 .

It is a cyclic number.

It is not a de Polignac number, because 1969920013 - 2²⁵ = 1936365581 is a prime.

It is a super-3 number, since 3×1969920013³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1969920023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984960006 + 984960007.

It is an arithmetic number, because the mean of its divisors is an integer number (984960007).

Almost surely, 2^1969920013 is an apocalyptic number.

It is an amenable number.

1969920013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969920013 is an equidigital number, since it uses as much as digits as its factorization.

1969920013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 1969920013 is about 44383.7809678265. The cubic root of 1969920013 is about 1253.5727149443.

The spelling of 1969920013 in words is "one billion, nine hundred sixty-nine million, nine hundred twenty thousand, thirteen".