2978957 has 4 divisors (see below), whose sum is σ = 2999100. Its totient is φ = 2958816.

The previous prime is 2978933. The next prime is 2978959. The reversal of 2978957 is 7598792.

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

It can be written as a sum of positive squares in 2 ways, for example, as 988036 + 1990921 = 994^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 2978957 - 2¹² = 2974861 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 (2978959) 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, 9848 + ... + 10145.

It is an arithmetic number, because the mean of its divisors is an integer number (749775).

2^2978957 is an apocalyptic number.

It is an amenable number.

2978957 is a deficient number, since it is larger than the sum of its proper divisors (20143).

2978957 is a wasteful number, since it uses less digits than its factorization.

2978957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20142.

The product of its digits is 317520, while the sum is 47.

The square root of 2978957 is about 1725.9655268863. The cubic root of 2978957 is about 143.8869515256.

The spelling of 2978957 in words is "two million, nine hundred seventy-eight thousand, nine hundred fifty-seven".