2697981 has 32 divisors (see below), whose sum is σ = 4462080. Its totient is φ = 1425600.

The previous prime is 2697977. The next prime is 2697983. The reversal of 2697981 is 1897962.

It is not a de Polignac number, because 2697981 - 2² = 2697977 is a prime.

It is a super-2 number, since 2×2697981² = 14558202952722, which contains 22 as substring.

2697981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2697983) 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 in 31 ways as a sum of consecutive naturals, for example, 7986 + ... + 8316.

It is an arithmetic number, because the mean of its divisors is an integer number (139440).

2^2697981 is an apocalyptic number.

It is an amenable number.

2697981 is a deficient number, since it is larger than the sum of its proper divisors (1764099).

2697981 is a wasteful number, since it uses less digits than its factorization.

2697981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377.

The product of its digits is 54432, while the sum is 42.

The square root of 2697981 is about 1642.5531954856. The cubic root of 2697981 is about 139.2129475835.

The spelling of 2697981 in words is "two million, six hundred ninety-seven thousand, nine hundred eighty-one".