2031397 has 2 divisors, whose sum is σ = 2031398. Its totient is φ = 2031396.

The previous prime is 2031391. The next prime is 2031409. The reversal of 2031397 is 7931302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1623076 + 408321 = 1274^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031397 - 2⁷ = 2031269 is a prime.

It is a super-4 number, since 4×2031397⁴ (a number of 26 digits) contains 4444 as substring.

2031397 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015698 + 1015699.

It is an arithmetic number, because the mean of its divisors is an integer number (1015699).

2^2031397 is an apocalyptic number.

It is an amenable number.

2031397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031397 is an equidigital number, since it uses as much as digits as its factorization.

2031397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 2031397 is about 1425.2708514525. The cubic root of 2031397 is about 126.6479804691.

Adding to 2031397 its reverse (7931302), we get a palindrome (9962699).

It can be divided in two parts, 203 and 1397, that added together give a square (1600 = 40²).

The spelling of 2031397 in words is "two million, thirty-one thousand, three hundred ninety-seven".