1969089977 has 2 divisors, whose sum is σ = 1969089978. Its totient is φ = 1969089976.

The previous prime is 1969089919. The next prime is 1969090021. The reversal of 1969089977 is 7799809691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1666190761 + 302899216 = 40819^2 + 17404^2 .

It is a cyclic number.

It is not a de Polignac number, because 1969089977 - 2⁸ = 1969089721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1969089907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984544988 + 984544989.

It is an arithmetic number, because the mean of its divisors is an integer number (984544989).

Almost surely, 2^1969089977 is an apocalyptic number.

It is an amenable number.

1969089977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969089977 is an equidigital number, since it uses as much as digits as its factorization.

1969089977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15431472, while the sum is 65.

The square root of 1969089977 is about 44374.4293146402. The cubic root of 1969089977 is about 1253.3966237577.

The spelling of 1969089977 in words is "one billion, nine hundred sixty-nine million, eighty-nine thousand, nine hundred seventy-seven".