2980781 has 4 divisors (see below), whose sum is σ = 2999232. Its totient is φ = 2962332.

The previous prime is 2980771. The next prime is 2980799. The reversal of 2980781 is 1870892.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2980781 - 2¹⁴ = 2964397 is a prime.

It is a super-2 number, since 2×2980781² = 17770110739922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2980711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8981 + ... + 9306.

It is an arithmetic number, because the mean of its divisors is an integer number (749808).

2^2980781 is an apocalyptic number.

It is an amenable number.

2980781 is a deficient number, since it is larger than the sum of its proper divisors (18451).

2980781 is a wasteful number, since it uses less digits than its factorization.

2980781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18450.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2980781 is about 1726.4938459201. The cubic root of 2980781 is about 143.9163126132.

The spelling of 2980781 in words is "two million, nine hundred eighty thousand, seven hundred eighty-one".