2972391 has 4 divisors (see below), whose sum is σ = 3963192. Its totient is φ = 1981592.

The previous prime is 2972383. The next prime is 2972419. The reversal of 2972391 is 1932792.

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 2972391 - 2³ = 2972383 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2972351) 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, 495396 + ... + 495401.

It is an arithmetic number, because the mean of its divisors is an integer number (990798).

2^2972391 is an apocalyptic number.

2972391 is a deficient number, since it is larger than the sum of its proper divisors (990801).

2972391 is an equidigital number, since it uses as much as digits as its factorization.

2972391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990800.

The product of its digits is 6804, while the sum is 33.

The square root of 2972391 is about 1724.0623538608. The cubic root of 2972391 is about 143.7811587151.

The spelling of 2972391 in words is "two million, nine hundred seventy-two thousand, three hundred ninety-one".