2645977 has 2 divisors, whose sum is σ = 2645978. Its totient is φ = 2645976.

The previous prime is 2645971. The next prime is 2645987. The reversal of 2645977 is 7795462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2143296 + 502681 = 1464^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645977 - 2⁷ = 2645849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2645971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322988 + 1322989.

It is an arithmetic number, because the mean of its divisors is an integer number (1322989).

2^2645977 is an apocalyptic number.

It is an amenable number.

2645977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645977 is an equidigital number, since it uses as much as digits as its factorization.

2645977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 2645977 is about 1626.6459356602. The cubic root of 2645977 is about 138.3126880046.

It can be divided in two parts, 264 and 5977, that added together give a square (6241 = 79²).

The spelling of 2645977 in words is "two million, six hundred forty-five thousand, nine hundred seventy-seven".