2978069869 has 2 divisors, whose sum is σ = 2978069870. Its totient is φ = 2978069868.

The previous prime is 2978069807. The next prime is 2978069909. The reversal of 2978069869 is 9689608792.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2533914244 + 444155625 = 50338^2 + 21075^2 .

It is a cyclic number.

It is not a de Polignac number, because 2978069869 - 2¹³ = 2978061677 is a prime.

It is a super-2 number, since 2×2978069869² = 17737800289291354322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2978069869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2978069669) 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, 1489034934 + 1489034935.

It is an arithmetic number, because the mean of its divisors is an integer number (1489034935).

Almost surely, 2^2978069869 is an apocalyptic number.

It is an amenable number.

2978069869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2978069869 is an equidigital number, since it uses as much as digits as its factorization.

2978069869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23514624, while the sum is 64.

The square root of 2978069869 is about 54571.6947601960. The cubic root of 2978069869 is about 1438.7266696801.

The spelling of 2978069869 in words is "two billion, nine hundred seventy-eight million, sixty-nine thousand, eight hundred sixty-nine".