2978149 has 4 divisors (see below), whose sum is σ = 2981664. Its totient is φ = 2974636.

The previous prime is 2978147. The next prime is 2978161. The reversal of 2978149 is 9418792.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2978149 - 2¹ = 2978147 is a prime.

It is a Duffinian number.

2978149 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978147) 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, 384 + ... + 2470.

It is an arithmetic number, because the mean of its divisors is an integer number (745416).

2^2978149 is an apocalyptic number.

It is an amenable number.

2978149 is a deficient number, since it is larger than the sum of its proper divisors (3515).

2978149 is a wasteful number, since it uses less digits than its factorization.

2978149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514.

The product of its digits is 36288, while the sum is 40.

The square root of 2978149 is about 1725.7314391295. The cubic root of 2978149 is about 143.8739412483.

The spelling of 2978149 in words is "two million, nine hundred seventy-eight thousand, one hundred forty-nine".