2291397 has 8 divisors (see below), whose sum is σ = 3097344. Its totient is φ = 1506528.

The previous prime is 2291389. The next prime is 2291417. The reversal of 2291397 is 7931922.

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

It is not a de Polignac number, because 2291397 - 2³ = 2291389 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 2²¹ + 9² + 1 + 3¹¹ + 9² + 7⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291327) 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, 5013 + ... + 5450.

It is an arithmetic number, because the mean of its divisors is an integer number (387168).

2^2291397 is an apocalyptic number.

It is an amenable number.

2291397 is a deficient number, since it is larger than the sum of its proper divisors (805947).

2291397 is a wasteful number, since it uses less digits than its factorization.

2291397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10539.

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

The square root of 2291397 is about 1513.7361064598. The cubic root of 2291397 is about 131.8358266583.

It can be divided in two parts, 229 and 1397, that multiplied together give a palindrome (319913).

The spelling of 2291397 in words is "two million, two hundred ninety-one thousand, three hundred ninety-seven".