2780677969 has 2 divisors, whose sum is σ = 2780677970. Its totient is φ = 2780677968.

The previous prime is 2780677927. The next prime is 2780677973. The reversal of 2780677969 is 9697760872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2609983744 + 170694225 = 51088^2 + 13065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780677969 - 2²¹ = 2778580817 is a prime.

It is a super-2 number, since 2×2780677969² = 15464339934563929922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2780671969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390338984 + 1390338985.

It is an arithmetic number, because the mean of its divisors is an integer number (1390338985).

Almost surely, 2^2780677969 is an apocalyptic number.

It is an amenable number.

2780677969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780677969 is an equidigital number, since it uses as much as digits as its factorization.

2780677969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The square root of 2780677969 is about 52732.1341214254. The cubic root of 2780677969 is about 1406.2101618765.

The spelling of 2780677969 in words is "two billion, seven hundred eighty million, six hundred seventy-seven thousand, nine hundred sixty-nine".