2977861 has 2 divisors, whose sum is σ = 2977862. Its totient is φ = 2977860.

The previous prime is 2977841. The next prime is 2977883. The reversal of 2977861 is 1687792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2825761 + 152100 = 1681^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2977861 - 2¹¹ = 2975813 is a prime.

It is a super-2 number, since 2×2977861² = 17735312270642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2977801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1488930 + 1488931.

It is an arithmetic number, because the mean of its divisors is an integer number (1488931).

2^2977861 is an apocalyptic number.

It is an amenable number.

2977861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2977861 is an equidigital number, since it uses as much as digits as its factorization.

2977861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 40.

The square root of 2977861 is about 1725.6479942329. The cubic root of 2977861 is about 143.8693033529.

The spelling of 2977861 in words is "two million, nine hundred seventy-seven thousand, eight hundred sixty-one".