2978159 has 4 divisors (see below), whose sum is σ = 2984520. Its totient is φ = 2971800.

The previous prime is 2978147. The next prime is 2978161. The reversal of 2978159 is 9518792.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2978159 - 2⁸ = 2977903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978119) 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, 2417 + ... + 3434.

It is an arithmetic number, because the mean of its divisors is an integer number (746130).

2^2978159 is an apocalyptic number.

2978159 is a deficient number, since it is larger than the sum of its proper divisors (6361).

2978159 is an equidigital number, since it uses as much as digits as its factorization.

2978159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360.

The product of its digits is 45360, while the sum is 41.

The square root of 2978159 is about 1725.7343364493. The cubic root of 2978159 is about 143.8741022810.

The spelling of 2978159 in words is "two million, nine hundred seventy-eight thousand, one hundred fifty-nine".