2780997 has 8 divisors (see below), whose sum is σ = 3723456. Its totient is φ = 1846272.

The previous prime is 2780993. The next prime is 2781001. The reversal of 2780997 is 7990872.

It is an interprime number because it is at equal distance from previous prime (2780993) and next prime (2781001).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2780997 - 2² = 2780993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033 + ... + 2574.

It is an arithmetic number, because the mean of its divisors is an integer number (465432).

2^2780997 is an apocalyptic number.

It is an amenable number.

2780997 is a deficient number, since it is larger than the sum of its proper divisors (942459).

2780997 is a wasteful number, since it uses less digits than its factorization.

2780997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 2780997 is about 1667.6321536838. The cubic root of 2780997 is about 140.6263938627.

The spelling of 2780997 in words is "two million, seven hundred eighty thousand, nine hundred ninety-seven".