2664397 has 2 divisors, whose sum is σ = 2664398. Its totient is φ = 2664396.

The previous prime is 2664379. The next prime is 2664401. The reversal of 2664397 is 7934662.

Together with previous prime (2664379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2499561 + 164836 = 1581^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 2664397 - 2¹⁹ = 2140109 is a prime.

It is a super-2 number, since 2×2664397² = 14198022747218, which contains 22 as substring.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁴ + 6⁷ + 4⁹ + 3¹³ + 9 + 7⁴ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2664307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332198 + 1332199.

It is an arithmetic number, because the mean of its divisors is an integer number (1332199).

2^2664397 is an apocalyptic number.

2664397 is the 873-rd centered heptagonal number.

It is an amenable number.

2664397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664397 is an equidigital number, since it uses as much as digits as its factorization.

2664397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 37.

The square root of 2664397 is about 1632.2980732697. The cubic root of 2664397 is about 138.6329012287.

The spelling of 2664397 in words is "two million, six hundred sixty-four thousand, three hundred ninety-seven".