2780671 has 2 divisors, whose sum is σ = 2780672. Its totient is φ = 2780670.

The previous prime is 2780647. The next prime is 2780683. The reversal of 2780671 is 1760872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2780671 - 2¹⁵ = 2747903 is a prime.

It is a plaindrome in base 8.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2780621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390335 + 1390336.

It is an arithmetic number, because the mean of its divisors is an integer number (1390336).

2^2780671 is an apocalyptic number.

2780671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780671 is an equidigital number, since it uses as much as digits as its factorization.

2780671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 2780671 is about 1667.5344074411. The cubic root of 2780671 is about 140.6208987117.

The spelling of 2780671 in words is "two million, seven hundred eighty thousand, six hundred seventy-one".