2638697 has 2 divisors, whose sum is σ = 2638698. Its totient is φ = 2638696.

The previous prime is 2638693. The next prime is 2638717. The reversal of 2638697 is 7968362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1590121 + 1048576 = 1261^2 + 1024^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638697 - 2² = 2638693 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6³ + 3² + 8⁷ + 6³ + 9 + 7⁵ .

It is not a weakly prime, because it can be changed into another prime (2638693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319348 + 1319349.

It is an arithmetic number, because the mean of its divisors is an integer number (1319349).

2^2638697 is an apocalyptic number.

It is an amenable number.

2638697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638697 is an equidigital number, since it uses as much as digits as its factorization.

2638697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 2638697 is about 1624.4066609073. The cubic root of 2638697 is about 138.1857227738.

The spelling of 2638697 in words is "two million, six hundred thirty-eight thousand, six hundred ninety-seven".